diff --git a/backend/shop/admin.py b/backend/shop/admin.py
index 945ad88..0f9407e 100644
--- a/backend/shop/admin.py
+++ b/backend/shop/admin.py
@@ -60,6 +60,10 @@ class OrderableAdminMixin:
         return redirect(request.META.get('HTTP_REFERER', '..'))
 
     def order_actions(self, obj):
+        # 只有专家用户才显示排序按钮
+        if not getattr(obj, 'is_star', True): # 默认为True是为了兼容其他模型，WeChatUser有is_star字段
+            return "默认排序"
+
         # 使用 inline style 实现基本样式，hover 效果如果不能用 CSS 文件，就只能妥协或者用 onmouseover
         btn_style = (
             "display: inline-flex; align-items: center; justify-content: center; "
diff --git a/backend/shop/models.py b/backend/shop/models.py
index 920fca7..084abeb 100644
--- a/backend/shop/models.py
+++ b/backend/shop/models.py
@@ -30,6 +30,13 @@ class WeChatUser(models.Model):
     created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
     updated_at = models.DateTimeField(auto_now=True, verbose_name="更新时间")
 
+    def save(self, *args, **kwargs):
+        is_new = self.pk is None
+        super().save(*args, **kwargs)
+        if is_new and self.order == 0:
+            WeChatUser.objects.filter(pk=self.pk).update(order=self.pk)
+            self.order = self.pk
+
     def __str__(self):
         return self.nickname or self.openid