diff --git a/mobile/blank.php b/mobile/blank.php
index e7713d3..176a48d 100644
--- a/mobile/blank.php
+++ b/mobile/blank.php
@@ -12,7 +12,7 @@ $redirect_uri = 'https://shop.heavenk.com/mobile/blank.php'; // 回调URL
 
 // 获取授权 code
 if (!isset($_GET['code'])) {
-    $url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . $app_id . '&redirect_uri=' . urlencode($redirect_uri) . '&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect';
+    $url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . $appid . '&redirect_uri=' . urlencode($redirect_uri) . '&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect';
     header('Location: ' . $url);
     exit;
 }