diff --git a/app/api/endpoints/wechat.py b/app/api/endpoints/wechat.py
index bc358c9..fd75a4e 100644
--- a/app/api/endpoints/wechat.py
+++ b/app/api/endpoints/wechat.py
@@ -88,7 +88,7 @@ async def wechat_phone_login(
                 nickname=f"蜜友{phone[-4:]}",
                 phone=phone,
                 user_code=user_code,
-                referral_code=None if len(request.referral_code) == 0 else request.referral_code,
+                referral_code=request.referral_code,
                 password=get_password_hash("123456"),
                 openid=openid,  # 保存 openid
                 unionid=unionid,  # 保存 unionid