diff --git a/themes/vue/_config.yml b/themes/vue/_config.yml
index 91848196d..d1e86defa 100644
--- a/themes/vue/_config.yml
+++ b/themes/vue/_config.yml
@@ -1,7 +1,6 @@
 site_description: Vue.js - The Progressive JavaScript Framework
 google_analytics: UA-46852172-3
-# TODO: update when v3 becomes the main docsite?
-root_domain: cn.vuejs.org
+root_domain: v2.cn.vuejs.org
 vue_version: 2.7.10
 # START SPONSORS
 special:
diff --git a/themes/vue/layout/layout.ejs b/themes/vue/layout/layout.ejs
index ace1c60e3..7c9e43d50 100644
--- a/themes/vue/layout/layout.ejs
+++ b/themes/vue/layout/layout.ejs
@@ -11,8 +11,8 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
 
     <!-- TODO: update when v3 becomes the main docsite -->
-    <link rel="alternate" hreflang="x-default" href="https://vuejs.org/<%- page.path %>">
-    <link rel="alternate" hreflang="zh" href="https://cn.vuejs.org/<%- page.path %>">
+    <link rel="alternate" hreflang="x-default" href="https://v2.vuejs.org/<%- page.path %>">
+    <link rel="alternate" hreflang="zh" href="https://v2.cn.vuejs.org/<%- page.path %>">
     <link rel="alternate" hreflang="ja" href="https://jp.vuejs.org/<%- page.path %>">
     <link rel="alternate" hreflang="ru" href="https://ru.vuejs.org/<%- page.path %>">
     <link rel="alternate" hreflang="ko" href="https://kr.vuejs.org/<%- page.path %>">
diff --git a/themes/vue/source/js/common.js b/themes/vue/source/js/common.js
index 9a0211065..18d487442 100644
--- a/themes/vue/source/js/common.js
+++ b/themes/vue/source/js/common.js
@@ -334,10 +334,9 @@
 
   // function: special logic for cn
   function getVersionOrigin (version) {
-    // TODO: update when v3 becomes the main docsite
     var originMap = {
-      'v3': 'https://v3.cn.vuejs.org/',
-      'SELF': 'https://cn.vuejs.org/',
+      'v3': 'https://cn.vuejs.org/',
+      'SELF': 'https://v2.cn.vuejs.org/',
       'v1': 'https://v1-cn.vuejs.org/',
       '012': 'https://012-cn.vuejs.org/'
     }