The numbering letters of different banks have different meanings.

Agricultural Bank:

V is a gold card customer, U is a platinum card customer, Z is a diamond card customer, and B is a five-star VIP customer.

China Construction Bank:

A starts with cash business, such as deposit and withdrawal; E is enterprise transfer business.

F is the cash business of the enterprise; V is a VIP customer, and only a VIP card can get the number.

China Merchants Bank:

A is an ordinary card, and B is a gold card. Generally speaking, they share the counter.

C is golden sunflower card and other financial accounts, and D should be corporate business.