diff --git a/video-gen-api/app/main.py b/video-gen-api/app/main.py
index bc89bb65..41a085f5 100644
--- a/video-gen-api/app/main.py
+++ b/video-gen-api/app/main.py
@@ -21,48 +21,6 @@ from app.services.log_config import decrypt_data
 logging.basicConfig(level=logging.INFO if settings.DEBUG else logging.WARNING)
 
 
-def _setup_payment_logger():
-    """Configure a dedicated file logger for payment events.
-
-    Logs are written to logs/payment_YYYY-MM-DD.log, rotated daily.
-    30 days of history are retained.
-    """
-    from logging.handlers import TimedRotatingFileHandler
-    log_dir = os.path.join(os.path.dirname(os.path.dirname(__file__)), "logs")
-    os.makedirs(log_dir, exist_ok=True)
-    log_file = os.path.join(log_dir, "payment.log")
-
-    payment_logger = logging.getLogger("payment")
-    payment_logger.setLevel(logging.INFO)
-    payment_logger.propagate = False  # don't double-log to root
-
-    # Avoid adding duplicate handlers on reload
-    if any(getattr(h, "_payment_file", False) for h in payment_logger.handlers):
-        return
-
-    handler = TimedRotatingFileHandler(
-        log_file,
-        when="midnight",
-        interval=1,
-        backupCount=30,
-        encoding="utf-8",
-        utc=False,  # use local time
-    )
-    handler.suffix = "%Y-%m-%d"  # files named like payment.log.2026-06-10
-    handler._payment_file = True  # type: ignore[attr-defined]
-    handler.setFormatter(logging.Formatter(
-        "%(asctime)s [%(levelname)s] %(message)s",
-        datefmt="%Y-%m-%d %H:%M:%S",
-    ))
-    payment_logger.addHandler(handler)
-    # Mirror to console in DEBUG mode
-    if settings.DEBUG:
-        payment_logger.addHandler(logging.StreamHandler())
-
-
-_setup_payment_logger()
-
-
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     from app.models import async_session
diff --git a/video-gen-api/app/services/payment.py b/video-gen-api/app/services/payment.py
index 1ff12e8b..54aa7e19 100644
--- a/video-gen-api/app/services/payment.py
+++ b/video-gen-api/app/services/payment.py
@@ -158,12 +158,8 @@ def _get_alipay_client(app_id: str, private_key: str, public_key: str, gateway:
     config.sign_type = "RSA2"
     config.charset = "utf-8"
     config.cert_path = certifi.where()
-    logger.info(
-        f"Initializing Alipay client: app_id={app_id}, gateway={config.server_url}, "
-        f"public_key={config.alipay_public_key}, "
-        f"private_key={config.app_private_key}, "
-        f"cert_path={config.cert_path}"
-    )
+    os.environ["SSL_CERT_FILE"] = certifi.where()
+    os.environ["REQUESTS_CA_BUNDLE"] = certifi.where()
     try:
         _alipay_client = DefaultAlipayClient(config)
         _alipay_client_app_id = app_id
@@ -314,6 +310,7 @@ def _create_alipay_order(order: PaymentOrder, db_configs: dict[str, str]) -> str
         model.out_trade_no = order.order_no
         model.total_amount = f"{order.amount:.2f}"
         model.subject = f"充值订单 {order.order_no}"
+        model.product_code = "QR_CODE_OFFLINE"
 
         body_parts = []
         if order.credits > 0: