diff --git a/AGENTS.md b/AGENTS.md
index d49ecb2..aaeddd0 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -85,7 +85,16 @@ git push origin master              # origin = Gitea（唯一的代码同步目
 
 App 内部两处端点已指向 Gitea（随本版 APK 生效）：
 
-- `AppUpdateManager.kt`：`gitea.kasugano.cn/api/v1/repos/zijunchiang/maidong-ktv/releases/latest`（App 内检查更新）
+- `AppUpdateManager.kt`（**2026-10 起为多源，Gitee 优先、Gitea 兜底**）：
+  - 检查更新：`https://gitee.com/api/v5/repos/zijunchiang/maidong-ktv/releases/latest`、
+    `https://gitea.kasugano.cn/api/v1/repos/zijunchiang/maidong-ktv/releases/latest`
+    —— **两个源都查**，取**版本更高**的那个（避免某一边滞后时漏更新）；
+  - 下载安装包：按「**Gitee → Gitea**」顺序尝试，一个失败自动换下一个（同版本两个地址互为镜像）；
+  - Gitee 的 Release API **无需令牌**即可读取（已实测），附件直链为 302 跳转到
+    `foruda.gitee.com` CDN，`instanceFollowRedirects=true` 可正常跟随（实测 22MB / 约 12s / md5 一致）；
+  - ⚠️ **只认以 `.apk` 结尾的附件**：Gitee 的 `assets` 里还会带自动生成的源码包
+    （`v1.5.5.zip` / `v1.5.5.tar.gz`），宽松判断会把源码包当安装包下载；
+  - 下载校验三条：HTTP 2xx、>1MB、**文件头 `PK`**，再用 PackageManager 复核包名。
 - `KtvJsBridge.kt`：`gitea.kasugano.cn/zijunchiang/maidong-ktv/raw/branch/master/app/src/main/assets/mobile/ktv_api.js`（JS 热更新）
 
 > 注意：Gitea 的 raw 规范路径是 `/raw/branch/<分支>/<文件>`；`/raw/<分支>/<文件>` 会 303 跳转。
@@ -186,7 +195,7 @@ $BT/apksigner verify 目标名.apk
 
 ### 版本号
 
-- `app/build.gradle`：`versionName "1.5.5"` / `versionCode 37`（18~21 被本机临时诊断包占用过）
+- `app/build.gradle`：`versionName "1.5.6"` / `versionCode 38`（1.5.5/37 已发布；1.5.6 为"更新源加 Gitee"这一改动的版本号，尚未打包）（18~21 被本机临时诊断包占用过）
 - App 内显示统一用纯版本号（不加 `(versionCode)` 括号）
 - ⚠️ **发布构建已开启 NewApi 闸门**（`lint { checkReleaseBuilds true; fatal += ['NewApi'] }`）：
   任何「调用了高于 `minSdk 21` 且未做版本守卫的 API」都会让 `assembleRelease` 直接失败。
diff --git a/app/build.gradle b/app/build.gradle
index 79f653a..75501de 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,8 +11,8 @@ android {
         applicationId "com.local.ktv"
         minSdk 21
         targetSdk 25
-        versionCode 37
-        versionName "1.5.5"
+        versionCode 38
+        versionName "1.5.6"
         ndk {
             // 双 ABI 打包:兼容 64 位(Exynos 1580 等 arm64-v8a)与 32 位设备(极米 Play 超越版
             // 的 Amlogic 950X2/S905X2 采用 32 位 Android 用户态,必须包含 armeabi-v7a,否则
diff --git a/app/src/main/java/com/local/ktv/AppUpdateManager.kt b/app/src/main/java/com/local/ktv/AppUpdateManager.kt
index 1e72e34..f6d3578 100644
--- a/app/src/main/java/com/local/ktv/AppUpdateManager.kt
+++ b/app/src/main/java/com/local/ktv/AppUpdateManager.kt
@@ -11,50 +11,82 @@ import java.io.FileOutputStream
 import java.net.HttpURLConnection
 import java.net.URL
 
-/** Gitea Release based in-app updater. */
+/**
+ * Release based in-app updater.
+ *
+ * **多更新源，Gitee 优先、Gitea 兜底**（2026-10 新增）：
+ *  - 检查更新：按 [SOURCES] 顺序逐个查（Gitee 在前），**取版本最高的那个**——
+ *    两个源都发时不会因为某一边滞后而漏掉新版本；
+ *  - 下载安装包：按「Gitee → Gitea」顺序尝试，一个失败自动换下一个；
+ *    同版本、不同源的下载地址互为镜像（[Release.mirrors]）。
+ *
+ * 为什么 Gitee 优先：国内直连速度快（实测 22MB 约 12s）；Gitea 作为兜底。
+ * 两个源的 Release 都带 APK 附件，地址形态同族（`/releases/download/<tag>/<文件>`）。
+ */
 object AppUpdateManager {
-    private const val LATEST_RELEASE_API =
-        "https://gitea.kasugano.cn/api/v1/repos/zijunchiang/maidong-ktv/releases/latest"
+    private data class Source(val name: String, val latestApi: String)
+
+    /** 更新源，**顺序即优先级**（Gitee 优先下载）。 */
+    private val SOURCES = listOf(
+        Source("gitee", "https://gitee.com/api/v5/repos/zijunchiang/maidong-ktv/releases/latest"),
+        Source("gitea", "https://gitea.kasugano.cn/api/v1/repos/zijunchiang/maidong-ktv/releases/latest"),
+    )
 
     data class Release(
         val version: String,
         val title: String,
         val notes: String,
+        /** 首选下载地址（Gitee）。 */
         val apkUrl: String,
         val apkName: String,
+        /** 备用下载地址（同版本的其它更新源），下载失败时按顺序自动重试。 */
+        val mirrors: List<String> = emptyList(),
     )
 
     fun check(currentVersion: String, result: (Result<Release?>) -> Unit) {
         Thread({
             result(runCatching {
-                val json = getText(LATEST_RELEASE_API)
-                val root = JSONObject(json)
-                val version = root.optString("tag_name").trim().removePrefix("v")
-                val assets = root.optJSONArray("assets")
-                var apkUrl = ""
-                var apkName = ""
-                if (assets != null) {
-                    for (index in 0 until assets.length()) {
-                        val asset = assets.optJSONObject(index) ?: continue
-                        val name = asset.optString("name")
-                        val url = asset.optString("browser_download_url")
-                        if (name.endsWith(".apk", ignoreCase = true) || url.contains(".apk", ignoreCase = true)) {
-                            apkName = name.ifBlank { "maidong-ktv-$version.apk" }
-                            apkUrl = url
-                            break
+                val candidates = ArrayList<Release>()
+                var lastError: Throwable? = null
+                for (source in SOURCES) {
+                    // 单个源失败不影响其它源：记一条 WARN 继续。
+                    val release = runCatching { fetchLatest(source) }
+                        .onFailure {
+                            lastError = it
+                            MiliLog.warn("UPDATE 检查失败 源=${source.name} ${it.javaClass.simpleName}: ${it.message}")
                         }
-                    }
+                        .getOrNull()
+                    if (release == null) continue
+                    MiliLog.info("UPDATE 检查 源=${source.name} 版本=${release.version}")
+                    candidates.add(release)
                 }
-                if (version.isBlank() || apkUrl.isBlank() || compareVersions(version, currentVersion) <= 0) null
-                else Release(
-                    version = version,
-                    title = root.optString("name").ifBlank { "麦动 KTV $version" },
-                    notes = root.optString("body"),
-                    apkUrl = apkUrl,
-                    apkName = apkName,
+                if (candidates.isEmpty()) {
+                    throw lastError ?: IllegalStateException("检查更新失败：所有更新源均不可用")
+                }
+                // 取版本最高的候选（手写循环，避免用到 API 24+ 的 Comparator 默认方法）。
+                var newest = candidates[0]
+                for (item in candidates) {
+                    if (compareVersions(item.version, newest.version) > 0) newest = item
+                }
+                if (newest.version.isBlank() || compareVersions(newest.version, currentVersion) <= 0) {
+                    return@runCatching null
+                }
+                // 同版本的地址按源优先级合并：Gitee 在最前（candidates 就是按 SOURCES 顺序构建的）。
+                val urls = LinkedHashSet<String>()
+                for (item in candidates) {
+                    if (item.version == newest.version && item.apkUrl.isNotBlank()) urls.add(item.apkUrl)
+                }
+                val ordered = urls.toList()
+                Release(
+                    version = newest.version,
+                    title = newest.title,
+                    notes = newest.notes,
+                    apkUrl = ordered.firstOrNull() ?: "",
+                    apkName = newest.apkName.ifBlank { "maidong-ktv-${newest.version}.apk" },
+                    mirrors = ordered.drop(1),
                 )
             })
-        }, "gitea-update-check").start()
+        }, "app-update-check").start()
     }
 
     fun download(
@@ -65,47 +97,115 @@ object AppUpdateManager {
     ) {
         Thread({
             result(runCatching {
-                val directory = File(activity.externalCacheDir ?: activity.cacheDir, "updates").apply { mkdirs() }
-                val target = File(directory, "maidong-ktv-${release.version}.apk")
-                val partial = File(directory, "${target.name}.download")
-                partial.delete()
-                val connection = (URL(release.apkUrl).openConnection() as HttpURLConnection).apply {
-                    connectTimeout = 15_000
-                    readTimeout = 30_000
-                    instanceFollowRedirects = true
-                    setRequestProperty("User-Agent", "MaidongKTV/${BuildConfig.VERSION_NAME}")
-                }
-                try {
-                    require(connection.responseCode in 200..299) { "下载失败：HTTP ${connection.responseCode}" }
-                    val total = connection.contentLengthCompat()
-                    connection.inputStream.use { input ->
-                        FileOutputStream(partial).use { output ->
-                            val buffer = ByteArray(128 * 1024)
-                            var downloaded = 0L
-                            while (true) {
-                                val count = input.read(buffer)
-                                if (count < 0) break
-                                output.write(buffer, 0, count)
-                                downloaded += count
-                                if (total > 0) progress((downloaded * 100 / total).toInt().coerceIn(0, 100))
-                            }
-                            output.fd.sync()
+                val urls = (listOf(release.apkUrl) + release.mirrors)
+                    .filter { it.isNotBlank() }
+                    .distinct()
+                require(urls.isNotEmpty()) { "下载失败：没有可用的下载地址" }
+                var lastError: Throwable? = null
+                for ((index, url) in urls.withIndex()) {
+                    val host = runCatching { URL(url).host }.getOrNull() ?: url
+                    try {
+                        val file = downloadFrom(activity, release, url, progress)
+                        if (index > 0) {
+                            MiliLog.notice("UPDATE 换源下载成功 源=$host 版本=${release.version}")
+                        } else {
+                            MiliLog.info("UPDATE 下载成功 源=$host 版本=${release.version}")
                         }
+                        return@runCatching file
+                    } catch (t: Throwable) {
+                        lastError = t
+                        MiliLog.warn("UPDATE 下载失败 源=$host 原因=${t.message}")
+                        // 还有备用地址就把进度归零重新下，让用户看到"换源重试"。
+                        if (index < urls.size - 1) progress(0)
                     }
-                } finally {
-                    connection.disconnect()
                 }
-                require(partial.length() > 1_000_000L) { "下载的安装包不完整" }
-                partial.inputStream().use { input ->
-                    require(input.read() == 'P'.code && input.read() == 'K'.code) { "下载内容不是 APK" }
-                }
-                val info = activity.packageManager.getPackageArchiveInfo(partial.absolutePath, 0)
-                require(info?.packageName == activity.packageName) { "安装包应用标识不匹配" }
-                target.delete()
-                require(partial.renameTo(target)) { "无法保存安装包" }
-                target
+                throw lastError ?: IllegalStateException("下载失败")
             })
-        }, "gitea-update-download").start()
+        }, "app-update-download").start()
+    }
+
+    /**
+     * 从单个地址下载并校验到本地。
+     *
+     * 校验三条：HTTP 2xx、文件 >1MB、**文件头是 `PK`（真 APK）**，再用 PackageManager 复核包名 ——
+     * 防止 Gitee 的 302 跳到错误页面时把 HTML 当成安装包保存下来。
+     */
+    private fun downloadFrom(
+        activity: Activity,
+        release: Release,
+        url: String,
+        progress: (Int) -> Unit,
+    ): File {
+        val directory = File(activity.externalCacheDir ?: activity.cacheDir, "updates").apply { mkdirs() }
+        val target = File(directory, "maidong-ktv-${release.version}.apk")
+        val partial = File(directory, "${target.name}.download")
+        partial.delete()
+        val connection = (URL(url).openConnection() as HttpURLConnection).apply {
+            connectTimeout = 15_000
+            readTimeout = 30_000
+            instanceFollowRedirects = true
+            setRequestProperty("User-Agent", "MaidongKTV/${BuildConfig.VERSION_NAME}")
+        }
+        try {
+            require(connection.responseCode in 200..299) { "下载失败：HTTP ${connection.responseCode}" }
+            val total = connection.contentLengthCompat()
+            connection.inputStream.use { input ->
+                FileOutputStream(partial).use { output ->
+                    val buffer = ByteArray(128 * 1024)
+                    var downloaded = 0L
+                    while (true) {
+                        val count = input.read(buffer)
+                        if (count < 0) break
+                        output.write(buffer, 0, count)
+                        downloaded += count
+                        if (total > 0) progress((downloaded * 100 / total).toInt().coerceIn(0, 100))
+                    }
+                    output.fd.sync()
+                }
+            }
+        } finally {
+            connection.disconnect()
+        }
+        require(partial.length() > 1_000_000L) { "下载的安装包不完整" }
+        partial.inputStream().use { input ->
+            require(input.read() == 'P'.code && input.read() == 'K'.code) { "下载内容不是 APK" }
+        }
+        val info = activity.packageManager.getPackageArchiveInfo(partial.absolutePath, 0)
+        require(info?.packageName == activity.packageName) { "安装包应用标识不匹配" }
+        target.delete()
+        require(partial.renameTo(target)) { "无法保存安装包" }
+        return target
+    }
+
+    /** 拉取单个更新源的 latest release；没有可用 APK 附件时返回 null。 */
+    private fun fetchLatest(source: Source): Release? {
+        val root = JSONObject(getText(source.latestApi))
+        val version = root.optString("tag_name").trim().removePrefix("v")
+        if (version.isBlank()) return null
+        var apkUrl = ""
+        var apkName = ""
+        val assets = root.optJSONArray("assets")
+        if (assets != null) {
+            for (index in 0 until assets.length()) {
+                val asset = assets.optJSONObject(index) ?: continue
+                val name = asset.optString("name")
+                val url = asset.optString("browser_download_url")
+                // ⚠️ 只认以 .apk 结尾的附件：Gitee 的 assets 里还会带自动生成的源码包
+                // （v1.5.5.zip / v1.5.5.tar.gz），按 url 含 ".apk" 之类宽松判断会选错。
+                if (!name.endsWith(".apk", ignoreCase = true) || url.isBlank()) continue
+                apkName = name
+                apkUrl = url
+                break
+            }
+        }
+        if (apkUrl.isBlank()) return null
+        return Release(
+            version = version,
+            title = root.optString("name").ifBlank { "麦动 KTV $version" },
+            notes = root.optString("body"),
+            apkUrl = apkUrl,
+            apkName = apkName.ifBlank { "maidong-ktv-$version.apk" },
+        )
     }
 
     /**