If it is an account of CCB, you can call 95533 (toll-free for fixed-line calls), transfer to manual service, quote your name, ID number and city where you opened the account, say that you can't remember the account number clearly, and ask for oral loss reporting (you don't need to provide a copy of your certificate for oral loss reporting). The oral report of loss is valid for 3 days, which will not have much impact on your friend's use of funds. Ask the operator to provide the account number, indicating that only by providing the account number will the teller help to report the loss in writing. The account will be automatically unsealed in three days, and then you can remit money to that account.

Note: find a friend of the same sex as the account owner to help make a phone call; If a friend finds that his account has been reported lost during the oral loss reporting period, he can provide valid identity documents and cancel the loss reporting at any time.