diff --git a/jituan/services/club_user.py b/jituan/services/club_user.py
index dc8a756..ea91401 100644
--- a/jituan/services/club_user.py
+++ b/jituan/services/club_user.py
@@ -32,3 +32,28 @@ def ensure_user_club_id(user, club_id):
     if current != club_id and hasattr(user, 'ClubID'):
         user.ClubID = club_id
         user.save(update_fields=['ClubID'])
+
+
+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。
+    """
+    if not user:
+        return ''
+    cid = (club_id or '').strip() or get_user_club_id(user)
+    uid = getattr(user, 'UserUID', None) or getattr(user, 'yonghuid', None)
+    if uid and cid:
+        binding = UserWxOpenid.query.filter(yonghuid=uid, club_id=cid).first()
+        if binding and binding.openid:
+            return binding.openid
+    legacy = getattr(user, 'OpenID', None) or getattr(user, 'openid', None)
+    return legacy or ''
+
+
+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