diff --git a/docusaurus.config.js b/docusaurus.config.js
index 85d95cf..fc70a5a 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -1,6 +1,7 @@
 // @ts-check
 
-const PREVIEW = process.env.PREVIEW ?? "false";
+// REGION can be either "cn" or "global"
+const REGION = process.env.REGION || "cn";
 
 /** @type {import('@docusaurus/types').Config} */
 const config = {
@@ -167,7 +168,24 @@ const config = {
       },
     }),
 
-  plugins: ["docusaurus-plugin-sass"],
+  plugins: [
+    "docusaurus-plugin-sass",
+    function envDefinePlugin() {
+      return {
+        name: "env-define-plugin",
+        configureWebpack() {
+          const webpack = require("webpack");
+          return {
+            plugins: [
+              new webpack.DefinePlugin({
+                "process.env.REGION": JSON.stringify(REGION),
+              }),
+            ],
+          };
+        },
+      };
+    },
+  ],
 };
 
 module.exports = config;
diff --git a/src/constants/env.ts b/src/constants/env.ts
index ef24d4d..65ebd3e 100644
--- a/src/constants/env.ts
+++ b/src/constants/env.ts
@@ -1,5 +1,5 @@
 export const BRAND: string = "leancloud";
-export const REGION: string = "cn";
+export const REGION: string = process.env.REGION || "cn";
 
 // Cloud Engine
 export const CLI_BINARY: string = BRAND === "tds" ? "tds" : "lean";