1, the shopping quota of Taobao users is relatively low, for example, only 10 yuan, and the price of goods is 20 yuan, so you can't choose to use it first and then pay.

2. The goods selected by Taobao users do not support payment after use. If the goods are not supported, the payment will not be displayed after use.

3. The account function is closed, and the user has overdue behavior when placing an order with down payment, which will cause the down payment function of the account to be closed and there will be no down payment on the system.