diff --git a/README.md b/README.md
index 7fc4047..0098de6 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,8 @@ The Home page provides a quick overview of the local proxy runtime and ready-to-
 - Check local connectivity and the application/core version at a glance.
 
 Core installation, version comparison, and offline installation are available from the
-**Version Management** page.
+**Version Management** page. Users in mainland China can manually enable the GitCode
+download source there so application and core updates prefer the mirror.
 
 ### OAuth account authorization
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 103adae..1ba8669 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -45,7 +45,7 @@ APIMart 是一个低成本的 AI 图像与视频生成 API 平台——GPT-Image
 - 复制可直接使用的 OpenAI、Claude 和 Gemini 兼容 API 地址。
 - 查看本地连接状态。
 
-内核安装、版本对比和离线安装功能位于 **版本管理** 页面。
+内核安装、版本对比和离线安装功能位于 **版本管理** 页面；国内网络环境可在此手动开启 GitCode 下载源，软件与内核更新会优先使用该镜像。
 
 ### OAuth 账号授权
 
diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 9562875..9d74eac 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -593,9 +593,7 @@ checksum = "7704b5fdd17b18ae31c4c1da5a2e0305a2bf17b5249300a9ee9ed7b72114c636"
 
 [[package]]
 name = "cpa-gui"
-
 version = "0.2.61"
-
 dependencies = [
  "base64 0.22.1",
  "chrono",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 4cf8d3b..cf58c8e 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -1,9 +1,7 @@
 [package]
 name = "cpa-gui"
 # Single source of truth for the desktop app version.
-
 version = "0.2.61"
-
 description = "CPA desktop management shell"
 authors = ["lzt404"]
 edition = "2021"
diff --git a/src-tauri/src/app_update.rs b/src-tauri/src/app_update.rs
index 00de815..2d5d156 100644
--- a/src-tauri/src/app_update.rs
+++ b/src-tauri/src/app_update.rs
@@ -3,6 +3,36 @@ use super::*;
 pub(crate) const PORTABLE_UPDATE_HELPER_ACK_FILE: &str = "update-helper-started.ack";
 const PORTABLE_UPDATE_HELPER_START_TIMEOUT: Duration = Duration::from_secs(10);
 
+#[tauri::command]
+pub(crate) fn get_version_source_settings(
+    gui_config_state: tauri::State<'_, GuiConfigState>,
+) -> Result<VersionSourceSettings, String> {
+    let config = gui_config_state.snapshot()?;
+    Ok(VersionSourceSettings {
+        prefer_gitcode_downloads: config.prefer_gitcode_downloads,
+        gitcode_available: gitcode_version_source_available(),
+    })
+}
+
+#[tauri::command]
+pub(crate) fn set_prefer_gitcode_downloads(
+    gui_config_state: tauri::State<'_, GuiConfigState>,
+    enabled: bool,
+) -> Result<VersionSourceSettings, String> {
+    if enabled && !gitcode_version_source_available() {
+        return Err("当前构建未配置完整的 GitCode 软件与内核镜像源".to_string());
+    }
+    let config = gui_config_state.set_prefer_gitcode_downloads(enabled)?;
+    Ok(VersionSourceSettings {
+        prefer_gitcode_downloads: config.prefer_gitcode_downloads,
+        gitcode_available: gitcode_version_source_available(),
+    })
+}
+
+pub(crate) fn gitcode_version_source_available() -> bool {
+    configured_gitcode_gui_repository().is_some() && configured_gitcode_core_repository().is_some()
+}
+
 #[tauri::command]
 pub(crate) fn open_external_url(app: tauri::AppHandle, url: String) -> Result<(), String> {
     open_external_url_inner(&app, &url)
@@ -13,7 +43,8 @@ pub(crate) async fn check_app_update(
     state: tauri::State<'_, AppUpdateState>,
     gui_config_state: tauri::State<'_, GuiConfigState>,
 ) -> Result<AppUpdateInfo, String> {
-    let proxy_url = gui_config_state.snapshot()?.proxy_url;
+    let config = gui_config_state.snapshot()?;
+    let proxy_url = config.proxy_url;
     let client = build_http_client_with_proxy(
         reqwest::Client::builder()
             .redirect(release_https_redirect_policy())
@@ -23,7 +54,7 @@ pub(crate) async fn check_app_update(
         &proxy_url,
         "创建版本检查客户端失败",
     )?;
-    let manifest = fetch_portable_update_manifest(&client).await?;
+    let manifest = fetch_portable_update_manifest(&client, config.prefer_gitcode_downloads).await?;
     let latest_version = normalize_version(&manifest.version);
     let current_version = normalize_version(env!("CARGO_PKG_VERSION"));
     let update_available = is_app_update_available(&current_version, &latest_version)?;
@@ -79,46 +110,61 @@ pub(crate) async fn check_app_update(
 
 pub(crate) async fn fetch_portable_update_manifest(
     client: &reqwest::Client,
+    prefer_gitcode: bool,
 ) -> Result<PortableUpdateManifest, String> {
-    match fetch_portable_update_manifest_url(client, APP_UPDATE_MANIFEST_URL).await {
-        Ok(manifest) => Ok(manifest),
-        Err(github_error) => {
-            let Some(repository) = configured_gitcode_gui_repository() else {
-                return Err(github_error);
-            };
-            let fallback = async {
-                let release_url =
-                    format!("https://api.gitcode.com/api/v5/repos/{repository}/releases/latest");
-                let release = client
-                    .get(release_url)
-                    .header(reqwest::header::ACCEPT, "application/json")
-                    .header(reqwest::header::USER_AGENT, APP_USER_AGENT)
-                    .send()
-                    .await
-                    .map_err(|error| format!("query GitCode latest release: {error}"))?
-                    .error_for_status()
-                    .map_err(|error| format!("read GitCode latest release: {error}"))?
-                    .json::<GitcodeRelease>()
-                    .await
-                    .map_err(|error| format!("parse GitCode latest release: {error}"))?;
-                validate_release_tag(&release.tag_name)?;
-                let manifest_url = gitcode_release_attachment_url(
-                    repository,
-                    &release.tag_name,
-                    APP_UPDATE_MANIFEST_NAME,
-                );
-                fetch_portable_update_manifest_url(client, &manifest_url).await
-            }
-            .await;
-            fallback.map_err(|gitcode_error| {
+    let github = || fetch_portable_update_manifest_url(client, APP_UPDATE_MANIFEST_URL);
+    let Some(repository) = configured_gitcode_gui_repository() else {
+        return github().await;
+    };
+
+    if prefer_gitcode {
+        match fetch_portable_update_manifest_from_gitcode(client, repository).await {
+            Ok(manifest) => Ok(manifest),
+            Err(gitcode_error) => github().await.map_err(|github_error| {
                 format!(
-                    "GitHub update source failed: {github_error}; GitCode fallback failed: {gitcode_error}"
+                    "GitCode update source failed: {gitcode_error}; GitHub fallback failed: {github_error}"
                 )
-            })
+            }),
+        }
+    } else {
+        match github().await {
+            Ok(manifest) => Ok(manifest),
+            Err(github_error) => {
+                fetch_portable_update_manifest_from_gitcode(client, repository)
+                    .await
+                    .map_err(|gitcode_error| {
+                        format!(
+                            "GitHub update source failed: {github_error}; GitCode fallback failed: {gitcode_error}"
+                        )
+                    })
+            }
         }
     }
 }
 
+pub(crate) async fn fetch_portable_update_manifest_from_gitcode(
+    client: &reqwest::Client,
+    repository: &str,
+) -> Result<PortableUpdateManifest, String> {
+    let release_url = format!("https://api.gitcode.com/api/v5/repos/{repository}/releases/latest");
+    let release = client
+        .get(release_url)
+        .header(reqwest::header::ACCEPT, "application/json")
+        .header(reqwest::header::USER_AGENT, APP_USER_AGENT)
+        .send()
+        .await
+        .map_err(|error| format!("query GitCode latest release: {error}"))?
+        .error_for_status()
+        .map_err(|error| format!("read GitCode latest release: {error}"))?
+        .json::<GitcodeRelease>()
+        .await
+        .map_err(|error| format!("parse GitCode latest release: {error}"))?;
+    validate_release_tag(&release.tag_name)?;
+    let manifest_url =
+        gitcode_release_attachment_url(repository, &release.tag_name, APP_UPDATE_MANIFEST_NAME);
+    fetch_portable_update_manifest_url(client, &manifest_url).await
+}
+
 pub(crate) async fn fetch_portable_update_manifest_url(
     client: &reqwest::Client,
     url: &str,
@@ -470,15 +516,23 @@ pub(crate) async fn start_app_update(
     if portable_update_platform_key().is_none() {
         return Err("当前平台不支持应用内自动升级".to_string());
     }
-    let proxy_url = gui_config_state.snapshot()?.proxy_url;
+    let config = gui_config_state.snapshot()?;
+    let proxy_url = config.proxy_url;
+    let prefer_gitcode = config.prefer_gitcode_downloads;
     let token = CancellationToken::new();
     let pending = state.start(token.clone())?;
     let task = state.snapshot();
     let _ = app.emit(APP_UPDATE_PROGRESS_EVENT, task);
     let update_app = app.clone();
     tauri::async_runtime::spawn(async move {
-        let outcome =
-            download_and_stage_portable_app_update(&update_app, &pending, &token, &proxy_url).await;
+        let outcome = download_and_stage_portable_app_update(
+            &update_app,
+            &pending,
+            &token,
+            &proxy_url,
+            prefer_gitcode,
+        )
+        .await;
         if let Err(error) = outcome {
             let state = update_app.state::<AppUpdateState>();
             let cancelled = token.is_cancelled();
@@ -501,10 +555,11 @@ pub(crate) async fn download_and_stage_portable_app_update(
     pending: &PendingAppUpdate,
     token: &CancellationToken,
     proxy_url: &str,
+    prefer_gitcode: bool,
 ) -> Result<(), String> {
     #[cfg(not(any(windows, target_os = "linux", target_os = "macos")))]
     {
-        let _ = (app, pending, token, proxy_url);
+        let _ = (app, pending, token, proxy_url, prefer_gitcode);
         Err("当前平台不支持应用内自动升级".to_string())
     }
 
@@ -524,7 +579,15 @@ pub(crate) async fn download_and_stage_portable_app_update(
             .map_err(|error| format!("创建应用更新临时目录失败: {error}"))?;
         let archive_path = work_dir.join("update.zip");
         let result = async {
-            download_portable_update_archive(app, pending, token, &archive_path, proxy_url).await?;
+            download_portable_update_archive(
+                app,
+                pending,
+                token,
+                &archive_path,
+                proxy_url,
+                prefer_gitcode,
+            )
+            .await?;
             if token.is_cancelled() {
                 return Err("应用更新下载已取消".to_string());
             }
@@ -602,7 +665,15 @@ pub(crate) async fn download_and_stage_portable_app_update(
             .map_err(|error| format!("创建应用更新临时目录失败: {error}"))?;
         let archive_path = work_dir.join("update.tar.gz");
         let result = async {
-            download_portable_update_archive(app, pending, token, &archive_path, proxy_url).await?;
+            download_portable_update_archive(
+                app,
+                pending,
+                token,
+                &archive_path,
+                proxy_url,
+                prefer_gitcode,
+            )
+            .await?;
             ensure_portable_update_download(token, &archive_path, pending)?;
             update_app_task(app, |task| {
                 task.cancellable = false;
@@ -666,7 +737,15 @@ pub(crate) async fn download_and_stage_portable_app_update(
             .map_err(|error| format!("创建应用更新临时目录失败: {error}"))?;
         let archive_path = work_dir.join("update.dmg");
         let result = async {
-            download_portable_update_archive(app, pending, token, &archive_path, proxy_url).await?;
+            download_portable_update_archive(
+                app,
+                pending,
+                token,
+                &archive_path,
+                proxy_url,
+                prefer_gitcode,
+            )
+            .await?;
             ensure_portable_update_download(token, &archive_path, pending)?;
             update_app_task(app, |task| {
                 task.cancellable = false;
@@ -839,6 +918,7 @@ pub(crate) async fn download_portable_update_archive(
     token: &CancellationToken,
     destination: &Path,
     proxy_url: &str,
+    prefer_gitcode: bool,
 ) -> Result<(), String> {
     let client = build_http_client_with_proxy(
         reqwest::Client::builder()
@@ -849,16 +929,17 @@ pub(crate) async fn download_portable_update_archive(
         proxy_url,
         "创建应用更新下载客户端失败",
     )?;
-    let urls = std::iter::once(&pending.asset.url)
-        .chain(pending.asset.fallback_urls.iter())
-        .collect::<Vec<_>>();
+    let urls = portable_update_download_urls(&pending.asset, prefer_gitcode);
     let mut failures = Vec::new();
     for (index, url) in urls.iter().enumerate() {
         update_app_task(app, |task| {
             task.downloaded_bytes = 0;
             task.percent = Some(0.0);
             if index > 0 {
-                task.message = Some("GitHub 下载失败，正在切换到 GitCode".to_string());
+                task.message = Some(format!(
+                    "下载失败，正在切换到 {}",
+                    update_download_source_name(url)
+                ));
             }
         });
         match download_portable_update_archive_url(app, pending, token, destination, &client, url)
@@ -872,6 +953,28 @@ pub(crate) async fn download_portable_update_archive(
     Err(format!("所有应用更新下载源均失败: {}", failures.join("; ")))
 }
 
+pub(crate) fn portable_update_download_urls(
+    asset: &PortableUpdateAsset,
+    prefer_gitcode: bool,
+) -> Vec<&str> {
+    let mut urls = std::iter::once(asset.url.as_str())
+        .chain(asset.fallback_urls.iter().map(String::as_str))
+        .collect::<Vec<_>>();
+    if prefer_gitcode {
+        urls.sort_by_key(|url| update_download_source_name(url) != "GitCode");
+    }
+    urls
+}
+
+pub(crate) fn update_download_source_name(url: &str) -> &'static str {
+    reqwest::Url::parse(url)
+        .ok()
+        .and_then(|url| url.host_str().map(str::to_string))
+        .filter(|host| host == "api.gitcode.com" || host.ends_with(".gitcode.com"))
+        .map(|_| "GitCode")
+        .unwrap_or("GitHub")
+}
+
 #[cfg(any(windows, target_os = "linux", target_os = "macos"))]
 pub(crate) async fn download_portable_update_archive_url(
     app: &tauri::AppHandle,
diff --git a/src-tauri/src/core_config/settings.rs b/src-tauri/src/core_config/settings.rs
index c1e458c..50bd8b5 100644
--- a/src-tauri/src/core_config/settings.rs
+++ b/src-tauri/src/core_config/settings.rs
@@ -1237,6 +1237,9 @@ pub(crate) fn load_or_create_gui_config() -> Result<GuiConfigFile, String> {
     if presence.silent_start.is_none() {
         changed = true;
     }
+    if presence.prefer_gitcode_downloads.is_none() {
+        changed = true;
+    }
     let management_secret_rotated = ensure_strong_management_secret(&mut config)?;
     changed |= management_secret_rotated;
     changed |= sanitize_gui_config(&mut config)?;
@@ -1590,6 +1593,10 @@ pub(crate) fn write_gui_config_to_path(
         ("plugins-enabled", value(config.plugins_enabled)),
         ("routing-strategy", value(config.routing_strategy.as_str())),
         ("proxy-url", value(config.proxy_url.as_str())),
+        (
+            "prefer-gitcode-downloads",
+            value(config.prefer_gitcode_downloads),
+        ),
         (
             "routing-session-affinity",
             value(config.routing_session_affinity),
diff --git a/src-tauri/src/core_runtime.rs b/src-tauri/src/core_runtime.rs
index 5f80e3e..d26e275 100644
--- a/src-tauri/src/core_runtime.rs
+++ b/src-tauri/src/core_runtime.rs
@@ -5,9 +5,10 @@ pub(crate) async fn check_latest_core(
     gui_config_state: tauri::State<'_, GuiConfigState>,
 ) -> Result<CoreLatest, String> {
     let platform = current_core_platform()?;
-    let proxy_url = gui_config_state.snapshot()?.proxy_url;
+    let config = gui_config_state.snapshot()?;
+    let proxy_url = config.proxy_url;
     let client = http_client(&proxy_url)?;
-    let release = fetch_release(&client, None).await?;
+    let release = fetch_release(&client, None, config.prefer_gitcode_downloads).await?;
     let asset = select_release_asset(&release, &platform)?;
 
     Ok(CoreLatest {
@@ -82,11 +83,19 @@ pub(crate) async fn install_core_version(
     gui_config_state: tauri::State<'_, GuiConfigState>,
     version: Option<String>,
 ) -> Result<CoreInstallResult, String> {
-    let proxy_url = gui_config_state.snapshot()?.proxy_url;
+    let config = gui_config_state.snapshot()?;
+    let proxy_url = config.proxy_url;
     let token = CancellationToken::new();
     state.start(token.clone(), version.clone())?;
-    let result =
-        install_core_version_inner(&window, state.inner(), token, version, &proxy_url).await;
+    let result = install_core_version_inner(
+        &window,
+        state.inner(),
+        token,
+        version,
+        &proxy_url,
+        config.prefer_gitcode_downloads,
+    )
+    .await;
     if result.is_err() {
         let _ = cleanup_core_work_dirs();
     }
@@ -170,11 +179,13 @@ pub(crate) async fn install_core_version_inner(
     token: CancellationToken,
     version: Option<String>,
     proxy_url: &str,
+    prefer_gitcode: bool,
 ) -> Result<CoreInstallResult, String> {
     let platform = current_core_platform()?;
     let client = http_client(proxy_url)?;
     state.progress(window, "检查版本", 0, None, true);
-    let release = fetch_release_cancelable(&client, version.as_deref(), &token).await?;
+    let release =
+        fetch_release_cancelable(&client, version.as_deref(), &token, prefer_gitcode).await?;
     let asset = select_release_asset(&release, &platform)?;
 
     let install_dir = core_install_dir()?;
@@ -305,17 +316,30 @@ pub(crate) fn install_bundled_core_inner(
 pub(crate) async fn fetch_release(
     client: &reqwest::Client,
     version: Option<&str>,
+    prefer_gitcode: bool,
 ) -> Result<GithubRelease, String> {
     if let Some(version) = version {
-        return Ok(release_from_tag(version));
+        return Ok(release_from_tag_for_repositories(
+            version,
+            configured_gitcode_core_repository(),
+            prefer_gitcode,
+        ));
     }
-    let atom_result = fetch_release_from_atom(client).await;
-    let github_result = match atom_result {
-        Ok(release) => Ok(release),
-        Err(atom_error) => fetch_release_from_page(client).await.map_err(|page_error| {
-            format!("GitHub 发布源请求失败: {atom_error}；release 页面请求失败: {page_error}")
-        }),
-    };
+    if prefer_gitcode {
+        if let Some(repository) = configured_gitcode_core_repository() {
+            return match fetch_release_from_gitcode(client, repository).await {
+                Ok(release) => Ok(release),
+                Err(gitcode_error) => fetch_release_from_github(client)
+                    .await
+                    .map_err(|github_error| {
+                        format!(
+                            "GitCode 内核发布源失败: {gitcode_error}；GitHub 回退源失败: {github_error}"
+                        )
+                    }),
+            };
+        }
+    }
+    let github_result = fetch_release_from_github(client).await;
     match github_result {
         Ok(release) => Ok(release),
         Err(github_error) => {
@@ -333,6 +357,18 @@ pub(crate) async fn fetch_release(
     }
 }
 
+pub(crate) async fn fetch_release_from_github(
+    client: &reqwest::Client,
+) -> Result<GithubRelease, String> {
+    let atom_result = fetch_release_from_atom(client).await;
+    match atom_result {
+        Ok(release) => Ok(release),
+        Err(atom_error) => fetch_release_from_page(client).await.map_err(|page_error| {
+            format!("GitHub 发布源请求失败: {atom_error}；release 页面请求失败: {page_error}")
+        }),
+    }
+}
+
 pub(crate) async fn fetch_release_from_gitcode(
     client: &reqwest::Client,
     repository: &str,
@@ -456,10 +492,10 @@ pub(crate) fn release_from_tag_for_repositories(
         let gitcode_url = gitcode_repository
             .map(|repository| gitcode_release_attachment_url(repository, &tag, &name));
         let (browser_download_url, fallback_download_urls) = if prefer_gitcode {
-            (
-                gitcode_url.unwrap_or_else(|| github_url.clone()),
-                Vec::new(),
-            )
+            match gitcode_url {
+                Some(gitcode_url) => (gitcode_url, vec![github_url]),
+                None => (github_url, Vec::new()),
+            }
         } else {
             (github_url, gitcode_url.into_iter().collect())
         };
@@ -569,9 +605,10 @@ pub(crate) async fn fetch_release_cancelable(
     client: &reqwest::Client,
     version: Option<&str>,
     token: &CancellationToken,
+    prefer_gitcode: bool,
 ) -> Result<GithubRelease, String> {
     tokio::select! {
-        result = fetch_release(client, version) => result,
+        result = fetch_release(client, version, prefer_gitcode) => result,
         _ = token.cancelled() => Err("已取消下载".to_string()),
     }
 }
@@ -658,7 +695,7 @@ pub(crate) async fn download_asset(
         if index > 0 {
             state.progress(
                 window,
-                "GitHub 下载失败，正在切换到 GitCode",
+                &format!("下载失败，正在切换到 {}", core_download_source_name(url)),
                 0,
                 asset.size,
                 true,
@@ -694,6 +731,15 @@ pub(crate) async fn download_asset(
     Err(format!("所有内核下载源均失败: {}", failures.join("；")))
 }
 
+pub(crate) fn core_download_source_name(url: &str) -> &'static str {
+    reqwest::Url::parse(url)
+        .ok()
+        .and_then(|url| url.host_str().map(str::to_string))
+        .filter(|host| host == "api.gitcode.com" || host.ends_with(".gitcode.com"))
+        .map(|_| "GitCode")
+        .unwrap_or("GitHub")
+}
+
 #[allow(clippy::too_many_arguments)]
 pub(crate) async fn download_asset_inner(
     client: &reqwest::Client,
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index a37612a..0f8f55c 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -582,6 +582,7 @@ struct GuiConfigFile {
     plugins_enabled: bool,
     routing_strategy: String,
     proxy_url: String,
+    prefer_gitcode_downloads: bool,
     routing_session_affinity: bool,
     routing_session_affinity_ttl: String,
     request_retry: u32,
@@ -694,6 +695,7 @@ impl Default for GuiConfigFile {
             plugins_enabled: false,
             routing_strategy: "round-robin".to_string(),
             proxy_url: String::new(),
+            prefer_gitcode_downloads: false,
             routing_session_affinity: false,
             routing_session_affinity_ttl: String::new(),
             request_retry: DEFAULT_REQUEST_RETRY,
@@ -722,6 +724,7 @@ struct GuiConfigPresence {
     plugins_enabled: Option<bool>,
     routing_strategy: Option<String>,
     proxy_url: Option<String>,
+    prefer_gitcode_downloads: Option<bool>,
     routing_session_affinity: Option<bool>,
     routing_session_affinity_ttl: Option<String>,
     request_retry: Option<u32>,
@@ -740,6 +743,13 @@ struct GuiSettings {
     close_behavior: WindowsCloseBehavior,
 }
 
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct VersionSourceSettings {
+    prefer_gitcode_downloads: bool,
+    gitcode_available: bool,
+}
+
 #[derive(Clone, Serialize)]
 #[serde(rename_all = "camelCase")]
 struct SoftwareSettings {
@@ -1661,6 +1671,16 @@ impl GuiConfigState {
         })
     }
 
+    fn set_prefer_gitcode_downloads(
+        &self,
+        prefer_gitcode_downloads: bool,
+    ) -> Result<GuiConfigFile, String> {
+        self.update(|config| {
+            config.prefer_gitcode_downloads = prefer_gitcode_downloads;
+            Ok(())
+        })
+    }
+
     fn set_window_size(&self, size: SavedWindowSize) -> Result<GuiConfigFile, String> {
         self.update(|config| {
             config.window_width = Some(size.width);
@@ -2090,6 +2110,8 @@ fn main() {
             list_oauth_browsers,
             open_oauth_url,
             open_external_url,
+            get_version_source_settings,
+            set_prefer_gitcode_downloads,
             check_app_update,
             get_app_update_task,
             start_app_update,
diff --git a/src-tauri/src/tests/app_settings.rs b/src-tauri/src/tests/app_settings.rs
index 281f1d9..4c64726 100644
--- a/src-tauri/src/tests/app_settings.rs
+++ b/src-tauri/src/tests/app_settings.rs
@@ -18,6 +18,7 @@ fn gui_field_edit_preserves_comments_and_unknown_configuration() {
         auth_dir: path_to_string(&home.join("custom-auth")),
         management_secret_key: "custom-secret".to_string(),
         usage_statistics_enabled: false,
+        prefer_gitcode_downloads: true,
         ..GuiConfigFile::default()
     };
 
@@ -31,6 +32,7 @@ fn gui_field_edit_preserves_comments_and_unknown_configuration() {
     assert!(content.contains("silent-start = true"));
     assert!(content.contains("management-secret-key = \"custom-secret\""));
     assert!(content.contains("usage-statistics-enabled = false"));
+    assert!(content.contains("prefer-gitcode-downloads = true"));
     assert!(!content.contains("codex-session-repair-on-launch"));
     assert!(!content.contains("claude-code-working-directory"));
     fs::remove_dir_all(home).unwrap();
@@ -89,6 +91,7 @@ fn gui_config_defaults_are_stable() {
     assert!(content.contains("management-secret-key = \"\""));
     assert!(content.contains("plugins-enabled = false"));
     assert!(content.contains("routing-strategy = \"round-robin\""));
+    assert!(content.contains("prefer-gitcode-downloads = false"));
     assert!(content.contains("request-retry = 3"));
     assert!(content.contains("max-retry-credentials = 0"));
     assert!(content.contains("max-retry-interval = 30"));
diff --git a/src-tauri/src/tests/app_update.rs b/src-tauri/src/tests/app_update.rs
index e32a6a6..6481eef 100644
--- a/src-tauri/src/tests/app_update.rs
+++ b/src-tauri/src/tests/app_update.rs
@@ -201,6 +201,26 @@ fn portable_update_asset_accepts_only_the_configured_gitcode_fallback() {
     .is_err());
 }
 
+#[test]
+fn portable_update_download_order_respects_gitcode_preference() {
+    let mut asset = portable_update_test_asset("1.2.3", "amd64");
+    let (_, display, suffix) = portable_update_asset_platform().unwrap();
+    let filename = format!("EasyCLIProxyAPI-v1.2.3-{display}-amd64.{suffix}");
+    asset.fallback_urls = vec![gitcode_release_attachment_url(
+        "mirror-owner/EasyCLIProxyAPI",
+        "v1.2.3",
+        &filename,
+    )];
+
+    let github_first = portable_update_download_urls(&asset, false);
+    assert_eq!(update_download_source_name(github_first[0]), "GitHub");
+    assert_eq!(update_download_source_name(github_first[1]), "GitCode");
+
+    let gitcode_first = portable_update_download_urls(&asset, true);
+    assert_eq!(update_download_source_name(gitcode_first[0]), "GitCode");
+    assert_eq!(update_download_source_name(gitcode_first[1]), "GitHub");
+}
+
 #[test]
 fn portable_update_state_supports_cancellation_and_snapshot_recovery() {
     let state = AppUpdateState::default();
@@ -608,7 +628,10 @@ fn gitcode_discovered_core_release_downloads_from_gitcode_first() {
             asset.browser_download_url,
             "https://api.gitcode.com/api/v5/repos/lzt404/CLIProxyAPI/releases/v7.2.80/attach_files/CLIProxyAPI_7.2.80_linux_aarch64.tar.gz/download"
         );
-    assert!(asset.fallback_download_urls.is_empty());
+    assert_eq!(
+        asset.fallback_download_urls,
+        ["https://github.com/router-for-me/CLIProxyAPI/releases/download/v7.2.80/CLIProxyAPI_7.2.80_linux_aarch64.tar.gz"]
+    );
 }
 
 #[test]
diff --git a/src-tauri/src/tests/core_config.rs b/src-tauri/src/tests/core_config.rs
index c671799..81ad30b 100644
--- a/src-tauri/src/tests/core_config.rs
+++ b/src-tauri/src/tests/core_config.rs
@@ -1039,6 +1039,7 @@ fn startup_preserves_all_user_owned_yaml_and_only_applies_gui_managed_values() {
         plugins_enabled: true,
         routing_strategy: "fill-first".to_string(),
         proxy_url: "socks5://127.0.0.1:7890".to_string(),
+        prefer_gitcode_downloads: false,
         routing_session_affinity: true,
         routing_session_affinity_ttl: "1h".to_string(),
         request_retry: 1,
diff --git a/src-tauri/src/usage.rs b/src-tauri/src/usage.rs
index caab1ea..cfbd9f4 100644
--- a/src-tauri/src/usage.rs
+++ b/src-tauri/src/usage.rs
@@ -3325,6 +3325,7 @@ mod tests {
             plugins_enabled: false,
             routing_strategy: "round-robin".to_string(),
             proxy_url: String::new(),
+            prefer_gitcode_downloads: false,
             routing_session_affinity: false,
             routing_session_affinity_ttl: String::new(),
             request_retry: crate::DEFAULT_REQUEST_RETRY,
diff --git a/src/i18n/ja.ts b/src/i18n/ja.ts
index ad8668f..d27814a 100644
--- a/src/i18n/ja.ts
+++ b/src/i18n/ja.ts
@@ -951,6 +951,10 @@ export const jaOverrides = {
   'kernel.versions.reinstall': '再インストール',
   'kernel.versions.noBundled': 'このリリースには組み込みコアが含まれていません',
   'kernel.versions.offlineInstall': 'オフラインインストール',
+  'kernel.versions.gitcodeSource': 'GitCode 中国向けダウンロード元',
+  'kernel.versions.gitcodeSourceHint': '有効にすると、ソフトウェアとコアの更新確認・ダウンロードで GitCode を優先し、失敗時は GitHub に切り替えます。',
+  'kernel.versions.gitcodeUnavailable': 'このビルドには完全な GitCode ミラー設定が含まれていません。',
+  'kernel.versions.gitcodeSaveFailed': 'ダウンロード元の切り替えに失敗しました: {error}',
   'kernel.access.firstKey': '最初のキー',
   'kernel.access.noConfiguredKey': 'キーが設定されていないため、現在はすべてのキーがデフォルトで許可されます',
   'kernel.access.connectable': '接続可能',
diff --git a/src/i18n/locales/en.ts b/src/i18n/locales/en.ts
index 4fd4477..ee94889 100644
--- a/src/i18n/locales/en.ts
+++ b/src/i18n/locales/en.ts
@@ -951,6 +951,10 @@ export const en: Record<MessageKey, string> = {
   'kernel.versions.reinstall': 'Reinstall',
   'kernel.versions.noBundled': 'This release does not include a bundled core',
   'kernel.versions.offlineInstall': 'Offline Install',
+  'kernel.versions.gitcodeSource': 'GitCode China Download Source',
+  'kernel.versions.gitcodeSourceHint': 'When enabled, software and core update checks and downloads prefer GitCode, with GitHub as fallback.',
+  'kernel.versions.gitcodeUnavailable': 'This build does not include complete GitCode mirror configuration.',
+  'kernel.versions.gitcodeSaveFailed': 'Failed to switch download source: {error}',
   'kernel.access.firstKey': 'First key',
   'kernel.access.noConfiguredKey': 'No key is configured; all keys are currently allowed by default',
   'kernel.access.connectable': 'Connectable',
diff --git a/src/i18n/locales/zh-CN.ts b/src/i18n/locales/zh-CN.ts
index fde2413..08d9a0b 100644
--- a/src/i18n/locales/zh-CN.ts
+++ b/src/i18n/locales/zh-CN.ts
@@ -949,6 +949,10 @@ export const zhCN = {
   'kernel.versions.reinstall': '重新安装',
   'kernel.versions.noBundled': '当前发行包未包含内置内核',
   'kernel.versions.offlineInstall': '离线安装',
+  'kernel.versions.gitcodeSource': 'GitCode 国内下载源',
+  'kernel.versions.gitcodeSourceHint': '开启后，软件和内核的版本检查及下载将优先使用 GitCode，失败时回退 GitHub。',
+  'kernel.versions.gitcodeUnavailable': '当前构建未配置完整的 GitCode 镜像源。',
+  'kernel.versions.gitcodeSaveFailed': '切换下载源失败：{error}',
   'kernel.access.firstKey': '第一个密钥',
   'kernel.access.noConfiguredKey': '未设置密钥，当前默认放行所有密钥',
   'kernel.access.connectable': '可连接',
diff --git a/src/pages/Kernel.tsx b/src/pages/Kernel.tsx
index 9ef5fb3..54b28df 100644
--- a/src/pages/Kernel.tsx
+++ b/src/pages/Kernel.tsx
@@ -61,6 +61,11 @@ type GuiSettings = {
   runOnStartup: boolean;
 };
 
+type VersionSourceSettings = {
+  preferGitcodeDownloads: boolean;
+  gitcodeAvailable: boolean;
+};
+
 type CoreConfigSummary = {
   apiKeys: Array<{ apiKey: string }>;
 };
@@ -77,33 +82,42 @@ let latestAutoCheckStarted = false;
 let cachedLatest: CoreLatest | null = null;
 let cachedLatestError = '';
 let latestCheckPromise: Promise<CoreLatest> | null = null;
+let latestRequestEpoch = 0;
 
 function displayAppVersion(version: string) {
   const resolvedVersion = version.trim();
   return resolvedVersion.startsWith('v') ? resolvedVersion : `v${resolvedVersion}`;
 }
 
-function requestLatestCore() {
-  if (latestCheckPromise) {
+function requestLatestCore(force = false) {
+  if (!force && latestCheckPromise) {
     return latestCheckPromise;
   }
 
-  latestCheckPromise = invoke<CoreLatest>('check_latest_core')
+  const requestEpoch = ++latestRequestEpoch;
+  const request = invoke<CoreLatest>('check_latest_core')
     .then((result) => {
-      cachedLatest = result;
-      cachedLatestError = '';
+      if (requestEpoch === latestRequestEpoch) {
+        cachedLatest = result;
+        cachedLatestError = '';
+      }
       return result;
     })
     .catch((error) => {
-      cachedLatest = null;
-      cachedLatestError = String(error);
+      if (requestEpoch === latestRequestEpoch) {
+        cachedLatest = null;
+        cachedLatestError = String(error);
+      }
       throw error;
     })
     .finally(() => {
-      latestCheckPromise = null;
+      if (latestCheckPromise === request) {
+        latestCheckPromise = null;
+      }
     });
+  latestCheckPromise = request;
 
-  return latestCheckPromise;
+  return request;
 }
 
 export type KernelView = 'home' | 'versions';
@@ -153,7 +167,11 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
   const [homeApiKeyError, setHomeApiKeyError] = useState(false);
   const [showHomeApiKey, setShowHomeApiKey] = useState(false);
   const [tlsEnabled, setTlsEnabled] = useState(false);
+  const [versionSource, setVersionSource] = useState<VersionSourceSettings | null>(null);
+  const [versionSourceSaving, setVersionSourceSaving] = useState(false);
+  const [versionSourceError, setVersionSourceError] = useState('');
   const installDialogRef = useRef<HTMLDivElement>(null);
+  const latestCheckEpochRef = useRef(0);
   const savedPortRef = useRef(8317);
   const processNoticeTimerRef = useRef<number | null>(null);
   const copiedApiTimerRef = useRef<number | null>(null);
@@ -230,6 +248,7 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
       void loadGuiSettings();
       void loadTlsSettings();
       void refreshStatus();
+      if (view === 'versions') void loadVersionSourceSettings();
       if (view === 'home') void loadHomeApiKey();
     }).then((stop) => {
       if (disposed) stop();
@@ -240,6 +259,7 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
     loadBundledCore();
     loadInstallTask();
     loadGuiSettings();
+    if (view === 'versions') void loadVersionSourceSettings();
     void loadTlsSettings();
     void getVersion()
       .then((version) => {
@@ -334,6 +354,16 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
     } catch {}
   };
 
+  const loadVersionSourceSettings = async () => {
+    try {
+      const settings = await invoke<VersionSourceSettings>('get_version_source_settings');
+      setVersionSource(settings);
+      setVersionSourceError('');
+    } catch (error) {
+      setVersionSourceError(String(error));
+    }
+  };
+
   const loadHomeApiKey = async () => {
     try {
       const settings = await invoke<CoreConfigSummary>('get_core_config_settings');
@@ -376,20 +406,41 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
     }
   };
 
-  const checkLatest = async () => {
+  const checkLatest = async (force = false) => {
+    const checkEpoch = ++latestCheckEpochRef.current;
     setCheckingLatest(true);
     setLatestError('');
     setMessage('');
     setMessageType('info');
 
     try {
-      const result = await requestLatestCore();
-      setLatest(result);
+      const result = await requestLatestCore(force);
+      if (checkEpoch === latestCheckEpochRef.current) setLatest(result);
     } catch (error) {
-      setLatest(null);
-      setLatestError(String(error));
+      if (checkEpoch === latestCheckEpochRef.current) {
+        setLatest(null);
+        setLatestError(String(error));
+      }
     } finally {
-      setCheckingLatest(false);
+      if (checkEpoch === latestCheckEpochRef.current) setCheckingLatest(false);
+    }
+  };
+
+  const updateVersionSource = async (enabled: boolean) => {
+    setVersionSourceSaving(true);
+    setVersionSourceError('');
+    try {
+      const settings = await invoke<VersionSourceSettings>('set_prefer_gitcode_downloads', { enabled });
+      setVersionSource(settings);
+      cachedLatest = null;
+      cachedLatestError = '';
+      setLatest(null);
+      await Promise.all([checkAppUpdate(), checkLatest(true)]);
+    } catch (error) {
+      await loadVersionSourceSettings();
+      setVersionSourceError(t('kernel.versions.gitcodeSaveFailed', { error: String(error) }));
+    } finally {
+      setVersionSourceSaving(false);
     }
   };
 
@@ -770,6 +821,39 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
         </div>
         ) : null}
 
+        {view === 'versions' ? (
+          <div className="panel version-source-panel">
+            <div className="version-source-copy">
+              <Info size={18} aria-hidden="true" />
+              <div>
+                <strong>{t('kernel.versions.gitcodeSource')}</strong>
+                <span>
+                  {versionSource?.gitcodeAvailable === false
+                    ? t('kernel.versions.gitcodeUnavailable')
+                    : t('kernel.versions.gitcodeSourceHint')}
+                </span>
+              </div>
+            </div>
+            <label className="switch-control" title={t('kernel.versions.gitcodeSource')}>
+              <input
+                type="checkbox"
+                role="switch"
+                checked={versionSource?.preferGitcodeDownloads ?? false}
+                disabled={
+                  (!versionSource?.gitcodeAvailable && !versionSource?.preferGitcodeDownloads)
+                  || versionSourceSaving
+                  || appUpdateTask.running
+                  || installing
+                }
+                aria-label={t('kernel.versions.gitcodeSource')}
+                onChange={(event) => void updateVersionSource(event.currentTarget.checked)}
+              />
+              <span className="switch-track" />
+            </label>
+            {versionSourceError ? <p className="error version-source-error" role="alert">{versionSourceError}</p> : null}
+          </div>
+        ) : null}
+
         {view === 'versions' ? (
           <div className="panel software-update-panel">
             <div className="panel-heading">
@@ -909,7 +993,7 @@ export function KernelPage({ view = 'home' }: { view?: KernelView }) {
               type="button"
               className="secondary-button"
               disabled={busy}
-              onClick={checkLatest}
+              onClick={() => void checkLatest()}
             >
               {checkingLatest ? t('kernel.update.checking') : t('kernel.versions.check')}
             </button>
diff --git a/src/styles.css b/src/styles.css
index f52c001..33de52b 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -1025,6 +1025,51 @@ textarea:focus-visible {
   grid-column: auto;
 }
 
+.version-source-panel {
+  display: flex;
+  min-height: 68px;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 20px;
+  padding-block: 14px;
+}
+
+.version-source-copy {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  gap: 11px;
+}
+
+.version-source-copy > svg {
+  flex: none;
+  color: var(--ui-accent);
+}
+
+.version-source-copy > div {
+  display: grid;
+  min-width: 0;
+  gap: 3px;
+}
+
+.version-source-copy strong {
+  color: var(--theme-39352f);
+  font-size: var(--font-size-body);
+}
+
+.version-source-copy span {
+  color: var(--theme-7a746c);
+  font-size: var(--font-size-meta);
+  line-height: var(--line-height-body);
+}
+
+.version-source-error {
+  width: 100%;
+  margin: 0;
+  font-size: var(--font-size-meta);
+}
+
 .version-heading-inline {
   display: flex;
   min-width: 0;
@@ -1457,10 +1502,15 @@ textarea:focus-visible {
 
   .version-management-layout {
     grid-template-columns: repeat(2, minmax(0, 1fr));
-    grid-auto-rows: 1fr;
+    grid-template-rows: auto minmax(0, 1fr);
     align-items: stretch;
   }
 
+  .version-management-layout > .version-source-panel {
+    grid-column: 1 / -1;
+    grid-row: 1;
+  }
+
   .version-management-layout > .panel {
     height: 100%;
     align-self: stretch;
@@ -1468,6 +1518,17 @@ textarea:focus-visible {
     row-gap: clamp(12px, 2vh, 22px);
   }
 
+  .version-management-layout > .version-source-panel {
+    height: auto;
+    grid-template-rows: none;
+    row-gap: 8px;
+  }
+
+  .version-management-layout > .software-update-panel,
+  .version-management-layout > .version-panel {
+    grid-row: 2;
+  }
+
   .home-page > .home-layout > .control-panel > .panel-detail-grid,
   .version-management-layout > .panel > .panel-detail-grid,
   .home-page > .client-api-panel > .client-api-grid {