The Measures for the Administration of Bank Cards have corresponding provisions on this:

Article 20? The interest-free repayment period is between the bank bookkeeping date and the due repayment date stipulated by the issuing bank. The longest interest-free repayment period is 60 days. The cardholder can enjoy the interest-free repayment period by repaying all the used bank funds before the due repayment date.

There is no need to pay interest for non-cash transactions, and if the cardholder has difficulty in repaying all the used bank funds before the due repayment date, he can repay according to the minimum repayment amount stipulated by the issuing bank.

Extended data:

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Relevant laws and regulations of the Measures for the Administration of Bank Cards:

Article 35 Budget units shall, in principle, open bank accounts in state-owned banks and state-controlled banks. If grass-roots budget units really need to open accounts in other banks, they shall do so on the premise of ensuring the safety of funds.

Considering the bank's qualifications, operating conditions, asset quality and other factors, the bank shall report to the higher authorities for approval and then open an account according to the prescribed approval procedures, and strictly control the process.

Article 36? If it is really necessary for a public institution that implements enterprise management to open a business capital account, it shall, with the consent of the superior competent unit, report its business license and relevant supporting documents to the central financial department (the Ministry of Finance or the offices of financial supervisors stationed in various places of the Ministry of Finance) for examination and approval.

Baidu Encyclopedia-Bank Card Management Measures