diff --git a/admin/src/localization/i18n.ts b/admin/src/localization/i18n.ts
index 67ae140e7..8a74282cc 100644
--- a/admin/src/localization/i18n.ts
+++ b/admin/src/localization/i18n.ts
@@ -50,7 +50,8 @@ i18n
     .init(
         {
             ns: ['translation','ep_admin_pads'],
-            fallbackLng: 'en'
+            // 后台默认中文显示
+            fallbackLng: 'zh-hans'
         }
     )
 
diff --git a/settings.json.template b/settings.json.template
index 66c9a7df2..56625873c 100644
--- a/settings.json.template
+++ b/settings.json.template
@@ -240,7 +240,7 @@
     "rtl":              false,
     "alwaysShowChat":   false,
     "chatAndUsers":     false,
-    "lang":             null
+    "lang":             "zh-hans"
   },
 
   /*
diff --git a/src/static/js/pluginfw/LinkInstaller.ts b/src/static/js/pluginfw/LinkInstaller.ts
index e5eaf0b5c..ed0a11e56 100644
--- a/src/static/js/pluginfw/LinkInstaller.ts
+++ b/src/static/js/pluginfw/LinkInstaller.ts
@@ -18,6 +18,7 @@ export class LinkInstaller {
 
     constructor() {
         this.livePluginManager = new PluginManager({
+            npmRegistryUrl: 'https://registry.npmmirror.com/',
             pluginsPath: pluginInstallPath,
             hostRequire: undefined,
             cwd: path.join(settings.root, 'src')
diff --git a/编译说明.md b/编译说明.md
new file mode 100644
index 000000000..7f83a7eef
--- /dev/null
+++ b/编译说明.md
@@ -0,0 +1,30 @@
+1. Download the latest Node.js runtime from [nodejs.org](https://nodejs.org/).
+2. Install pnpm: `npm install -g pnpm` (Administrator privileges may be required).
+3. Clone the repository: `git clone -b master`
+4. Run `pnpm i`
+5. Run `pnpm run build:etherpad`
+6. Run `pnpm run prod`
+7. Visit `http://localhost:9001` in your browser.
+
+
+后台中文设置，找到文件
+ etherpad-lite\admin\src\localization>i18n.ts              
+ // 修改
+ fallbackLng: 'zh-hans'
+  
+前台中文设置。搜索lang，改成
+lang = 'zh-hans'
+
+修改文件
+etherpad-lite\src\static\js\pluginfw> LinkInstaller.ts
+      constructor() {
+        this.livePluginManager = new PluginManager({
+            //增加 插件拉不下来问题解决。
+            npmRegistryUrl: 'https://registry.npmmirror.com/',
+            pluginsPath: pluginInstallPath,
+            hostRequire: undefined,
+            cwd: path.join(settings.root, 'src')
+        });
+        this.dependenciesMap = new Map();
+
+    }
\ No newline at end of file