Shall not exceed 20,000 yuan.

The "Bank Card Management Measures" have corresponding provisions:

Article 45 Card-issuing banks shall comply with the following bank card business risk control indicators:

(1) The amount of a single overdraft incurred by the same cardholder shall not exceed 20,000 yuan (including the equivalent foreign currency) for personal cards, and shall not exceed 50,000 yuan (including the equivalent foreign currency) for corporate cards.

(2) The monthly overdraft balance of the same account for personal cards shall not exceed 50,000 yuan (including the equivalent in foreign currencies), and for corporate cards shall not exceed 3% of the card-issuing bank's comprehensive credit limit for the unit. For units that have no comprehensive credit limit to refer to, their monthly overdraft balance shall not exceed 100,000 yuan.

Extended information:?

Relevant legal provisions of the "Bank Card Management Measures":?

Article 57: Customers pay through bank settlement accounts , the payment institution should also record the corresponding bank settlement account number. If a customer pays through a non-bank settlement account, the payment institution shall also record the name and number on the customer's valid identity document.

If a payment institution accepts customer reserves, it shall open a special deposit account for reserves in a commercial bank to deposit the reserves. Unless otherwise specified by the People's Bank of China. A payment institution can only choose one commercial bank as the reserve depository bank.

Article 58: A payment institution shall sign a reserve fund custody agreement with the legal person institution or authorized branch of a commercial bank to clarify the rights, obligations and responsibilities of both parties. The payment institution shall submit the reserve deposit custody agreement and the information on the reserve special deposit account to the local branch of the People's Bank of China.

Baidu Encyclopedia - "Bank Card Management Measures"