diff --git a/app/HomeClient.tsx b/app/HomeClient.tsx
index 0c653cc..0a01b06 100644
--- a/app/HomeClient.tsx
+++ b/app/HomeClient.tsx
@@ -57,6 +57,13 @@ function clearAnonymousUserCookie(): void {
   clearCookie(ANONYMOUS_USER_COOKIE);
 }
 
+function getWechatUserIdFromStorage(): string {
+  return (
+    (getStorage("wechatUserId") || "").trim() ||
+    (getStorage("userid") || "").trim()
+  );
+}
+
 function setPayOrderCookie(orderId: string): void {
   if (typeof document === "undefined") return;
   const normalizedOrderId = orderId.trim();
@@ -194,6 +201,14 @@ export default function HomeClient() {
     setUserName(name);
   }, []);
 
+  const resolveVipLookupUserId = useCallback((fallback?: string | null): string => {
+    // 业务优先级：email > 真实userid > user_id
+    // check-by-user 仅接收 user_id 字段，因此这里至少保证 userid > user_id
+    const wechatUserId = getWechatUserIdFromStorage();
+    if (wechatUserId) return wechatUserId;
+    return (fallback || "").trim();
+  }, []);
+
   const recoverAnonymousUserId = useCallback(
     async (params: { userId?: string; email?: string; wechatUserId?: string }) => {
       const payload: Record<string, string> = {};
@@ -745,8 +760,7 @@ export default function HomeClient() {
 
       // 校验逻辑：有本地存储（登录资料+VIP）时优先使用并校验；无身份/VIP 时点击按钮直接进入支付，不校验
       const wechatUserId =
-        (getStorage("wechatUserId") || "").trim() ||
-        (getStorage("userid") || "").trim();
+        getWechatUserIdFromStorage();
       let anonymousCandidate = getStoredAnonymousUserId();
       // 参数 userid 是真实微信用户标识时，应优先用它校验 VIP，避免被历史/新生成 userId 干扰
       if (wechatUserId) {
@@ -886,7 +900,9 @@ export default function HomeClient() {
 
       // 仅当有本地存储的 userId 时才校验（无身份/VIP 时跳过，点击按钮直接进入支付流程）
       if (hadStoredUserId) {
-        const userIdForCheck = getStoredAnonymousUserId() || getStorage("userId");
+        const userIdForCheck = resolveVipLookupUserId(
+          getStoredAnonymousUserId() || getStorage("userId")
+        );
         if (userIdForCheck) {
           const found = await checkPaymentFromPB(userIdForCheck);
           if (found) {
@@ -903,6 +919,7 @@ export default function HomeClient() {
     getOrCreateUserId,
     getStoredAnonymousUserId,
     checkPaymentFromPB,
+    resolveVipLookupUserId,
     recoverAnonymousUserId,
     savePaidType,
     saveUserName,