Bank card binding account refers to binding bank card account, and then conducting inquiry, payment, cash withdrawal, deduction and other services through the bound account. There are many scenarios that need to bind bank cards. Different scenarios have different requirements for binding bank cards and different interface requirements. Generally, on the merchant side, the so-called "binding" mainly involves the following scenarios:

1, real-name authentication;

2. Real name authentication+bank card withdrawal;

3. Express payment (merchant-side opening);

4. Bank card withholding.