1. physical savings cards: in principle, no more than four, and normal replacement cards, loss replacement cards and some joint-name cards are not subject to this restriction (such as social security cards and military insurance cards).

2. Physical credit cards: The total number of primary cards, secondary cards and supplementary cards cannot exceed 20 (except invalid cards and received cards).

3. Class I account: only one account can be opened.

4. Class II physical savings card: optional when opening an account. Online debit card applications are also subject to this restriction. You can only apply for one card at a time, and you can apply for the next one after opening the card.