This is clearly stipulated in the Measures for the Administration of RMB Bank Settlement Accounts.

Measures for the administration of RMB bank settlement accounts:

Article 61 A bank shall designate a special person to be responsible for the examination and management of the opening, use and cancellation of a bank settlement account, responsible for the high banquet examination of the depositor's application materials for opening an account, and timely submit the depositor's expense account information in accordance with the provisions of these Measures, establish and improve the expense account registration system, establish a bank settlement account management file, and manage it according to the accounting file.

The storage period of the bank settlement account management file is 10 year after the bank settlement account is cancelled.

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This is clearly stipulated in the Measures for the Administration of RMB Bank Settlement Accounts.

Measures for the administration of RMB bank settlement accounts:

Article 61 A bank shall designate a special person to be responsible for the examination and management of the opening, use and cancellation of a bank settlement account, responsible for the high banquet examination of the depositor's application materials for opening an account, and timely submit the depositor's expense account information in accordance with the provisions of these Measures, establish and improve the expense account registration system, establish a bank settlement account management file, and manage it according to the accounting file.

The storage period of the bank settlement account management file is 10 year after the bank settlement account is cancelled.