diff --git a/jituan/services/club_user.py b/jituan/services/club_user.py
index af6cd8f..c62f9b0 100644
--- a/jituan/services/club_user.py
+++ b/jituan/services/club_user.py
@@ -1,9 +1,13 @@
 """用户所属俱乐部解析。"""
+import logging
+
 from django.db import IntegrityError, transaction
 
 from jituan.constants import CLUB_ID_DEFAULT
 from jituan.models import UserWxOpenid
 
+logger = logging.getLogger(__name__)
+
 
 def resolve_invite_party_club(user, request_club_id=None):
     """
@@ -202,9 +206,9 @@ def _looks_like_wx_openid(value):
 
 def get_wx_openid_for_user(user, club_id=None):
     """
-    按俱乐部取微信支付 JSAPI 用 openid。
-    多俱乐部用户 openid 在 user_wx_openid；xq 老用户可回落 User.OpenID；
-    星之界等俱乐部用户常 UserName=openid 且 OpenID 为空，再回落 UserName。
+    按俱乐部取微信支付 JSAPI 用 openid（须与 club.pay_app_id 对应）。
+    优先 user_wx_openid(yonghuid, club_id)；禁止回落到其他俱乐部的 openid。
+    仅当目标俱乐部为 xq 且用户无任何 user_wx_openid 记录时，才回落 legacy User.OpenID。
     """
     if not user:
         return ''
@@ -214,6 +218,22 @@ def get_wx_openid_for_user(user, club_id=None):
         binding = UserWxOpenid.query.filter(yonghuid=uid, club_id=cid).first()
         if binding and binding.openid:
             return binding.openid
+        other_bindings = list(
+            UserWxOpenid.query.filter(yonghuid=uid)
+            .exclude(club_id=cid)
+            .values_list('club_id', flat=True)[:5]
+        )
+        if other_bindings:
+            logger.warning(
+                '[PAY_OPENID] uid=%s 在俱乐部 %s 无 openid 绑定，但已有其他俱乐部绑定 %s；'
+                '禁止跨小程序回落 legacy openid，请在本小程序重新登录',
+                uid, cid, other_bindings,
+            )
+            return ''
+
+    if cid != CLUB_ID_DEFAULT:
+        return ''
+
     legacy = getattr(user, 'OpenID', None) or getattr(user, 'openid', None)
     if legacy:
         return legacy.strip()
@@ -227,5 +247,12 @@ def get_payment_openid(request, user=None, club_id=None):
     """下单/充值：按请求俱乐部解析 openid。"""
     from jituan.services.club_write import resolve_club_id_for_write
     user = user or getattr(request, 'user', None)
-    cid = club_id or resolve_club_id_for_write(request, user)
-    return get_wx_openid_for_user(user, cid), cid
+    cid = (club_id or '').strip() or resolve_club_id_for_write(request, user)
+    openid = get_wx_openid_for_user(user, cid)
+    if not openid and user:
+        uid = getattr(user, 'UserUID', None) or getattr(user, 'yonghuid', None)
+        logger.warning(
+            '[PAY_OPENID] 无法解析支付 openid uid=%s club=%s user_club=%s',
+            uid, cid, get_user_club_id(user),
+        )
+    return openid, cid
diff --git a/products/views/chongzhi_payment.py b/products/views/chongzhi_payment.py
index a727a08..78e2aef 100644
--- a/products/views/chongzhi_payment.py
+++ b/products/views/chongzhi_payment.py
@@ -176,10 +176,14 @@ class ShangjiaChongzhi(APIView):
                     }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
             else:
                 try:
-                    pay_openid, _ = get_payment_openid(request)
+                    pay_club = resolve_club_id_for_write(request, request.user)
+                    pay_openid, _ = get_payment_openid(request, club_id=pay_club)
                     if not pay_openid:
                         chongzhi_jilu.delete()
-                        return Response({'code': 400, 'message': '用户openid不存在'}, status=status.HTTP_400_BAD_REQUEST)
+                        return Response({
+                            'code': 400,
+                            'message': '当前小程序未绑定微信openid，请退出后重新登录再支付',
+                        }, status=status.HTTP_400_BAD_REQUEST)
                     pay_params = self.generate_wechat_pay_params(
                         dingdanid=dingdanid,
                         jine=jine,
diff --git a/products/views/huiyuan_payment.py b/products/views/huiyuan_payment.py
index 17e8e12..32484c6 100644
--- a/products/views/huiyuan_payment.py
+++ b/products/views/huiyuan_payment.py
@@ -187,7 +187,7 @@ class HuiyuanGoumai(APIView):
                     }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
             else:
                 try:
-                    pay_openid, _ = get_payment_openid(request)
+                    pay_openid, pay_club = get_payment_openid(request, club_id=club_id)
                     if not pay_openid:
                         from jituan.services.member_recharge import MEMBER_CANCELLED_STATUS
                         chongzhi_jilu.zhuangtai = MEMBER_CANCELLED_STATUS
@@ -195,14 +195,15 @@ class HuiyuanGoumai(APIView):
                         chongzhi_jilu.save(update_fields=['zhuangtai', 'shuoming'])
                         return Response({
                             'code': 400,
-                            'message': '用户openid不存在',
+                            'message': '当前小程序未绑定微信openid，请退出后重新登录再支付',
                             'dingdanid': dingdanid,
                         }, status=status.HTTP_400_BAD_REQUEST)
                     pay_params = self.generate_wechat_pay_params(
                         dingdanid=dingdanid,
                         jine=jine,
                         openid=pay_openid,
-                        pay_type='huiyuan'
+                        pay_type='huiyuan',
+                        club_id=pay_club,
                     )
                 except Exception as e:
                     from jituan.services.member_recharge import MEMBER_CANCELLED_STATUS
@@ -234,13 +235,17 @@ class HuiyuanGoumai(APIView):
                 'message': '服务器内部错误，请稍后重试'
             }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 
-    def generate_wechat_pay_params(self, dingdanid, jine, openid, pay_type):
+    def generate_wechat_pay_params(self, dingdanid, jine, openid, pay_type, club_id=None):
         """生成微信支付参数（完整版，无省略）"""
         # 微信支付配置 - 从settings中获取
         from jituan.services.club_write import resolve_club_id_for_write
         from jituan.services.wechat_pay import get_wechat_v2_config, log_wechat_v2_pay_diag, parse_wechat_v2_unifiedorder_response
-        pay_cfg = get_wechat_v2_config(resolve_club_id_for_write(self.request, self.request.user))
-        log_wechat_v2_pay_diag(pay_cfg, scene='huiyuan', openid=openid, order_hint=dingdanid)
+        pay_club = club_id or resolve_club_id_for_write(self.request, self.request.user)
+        pay_cfg = get_wechat_v2_config(pay_club)
+        uid = getattr(self.request.user, 'UserUID', '')
+        log_wechat_v2_pay_diag(
+            pay_cfg, scene='huiyuan', openid=openid, order_hint=f'{dingdanid} uid={uid}',
+        )
         APPID = pay_cfg['appid']
         MCHID = pay_cfg['mch_id']
         KEY = pay_cfg['key']
diff --git a/products/views/jifen_payment.py b/products/views/jifen_payment.py
index dc5e525..c09048d 100644
--- a/products/views/jifen_payment.py
+++ b/products/views/jifen_payment.py
@@ -152,10 +152,14 @@ class JifenBuchong(APIView):
                     }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
             else:
                 try:
-                    pay_openid, _ = get_payment_openid(request)
+                    pay_club = resolve_club_id_for_write(request, request.user)
+                    pay_openid, _ = get_payment_openid(request, club_id=pay_club)
                     if not pay_openid:
                         chongzhi_jilu.delete()
-                        return Response({'code': 400, 'message': '用户openid不存在'}, status=status.HTTP_400_BAD_REQUEST)
+                        return Response({
+                            'code': 400,
+                            'message': '当前小程序未绑定微信openid，请退出后重新登录再支付',
+                        }, status=status.HTTP_400_BAD_REQUEST)
                     pay_params = self.generate_wechat_pay_params(
                         dingdanid=dingdanid,
                         jine=jine,
diff --git a/products/views/yajin_payment.py b/products/views/yajin_payment.py
index 40f460c..e20e2d5 100644
--- a/products/views/yajin_payment.py
+++ b/products/views/yajin_payment.py
@@ -166,10 +166,14 @@ class YajinGoumai(APIView):
                     }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
             else:
                 try:
-                    pay_openid, _ = get_payment_openid(request)
+                    pay_club = resolve_club_id_for_write(request, request.user)
+                    pay_openid, _ = get_payment_openid(request, club_id=pay_club)
                     if not pay_openid:
                         chongzhi_jilu.delete()
-                        return Response({'code': 400, 'message': '用户openid不存在'}, status=status.HTTP_400_BAD_REQUEST)
+                        return Response({
+                            'code': 400,
+                            'message': '当前小程序未绑定微信openid，请退出后重新登录再支付',
+                        }, status=status.HTTP_400_BAD_REQUEST)
                     pay_params = self.generate_wechat_pay_params(
                         dingdanid=dingdanid,
                         jine=jine,
diff --git a/users/views/pay.py b/users/views/pay.py
index 06b1d8c..b9e333b 100644
--- a/users/views/pay.py
+++ b/users/views/pay.py
@@ -160,12 +160,13 @@ class FaKuanPayView(APIView):
                         'message': f'支付参数生成失败: {str(e)}'
                     }, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
             else:
-                pay_openid, _ = get_payment_openid(request)
+                pay_club = penalty_cz_club_id(fadan)
+                pay_openid, _ = get_payment_openid(request, club_id=pay_club)
                 if not pay_openid:
                     chongzhi_jilu.delete()
                     return Response({
                         'code': 400,
-                        'message': '用户openid不存在，无法发起微信支付',
+                        'message': '当前小程序未绑定微信openid，请退出后重新登录再支付',
                     }, status=status.HTTP_400_BAD_REQUEST)
                 try:
                     pay_params = self.generate_wechat_pay_params(