1, credit card limit is insufficient. Insufficient credit card limit will lead to the payment code of Zhangjiagang Rural Commercial Bank unable to use credit card, so you can apply for temporary credit line.

2. The quick payment function is not enabled. Failure to open the fast payment function will also lead to the inability to use credit cards after Zhangjiagang Rural Commercial Bank pays the code. You can call the customer service phone of the bank credit card center to apply for opening, and you can scan the code to pay after opening.