For the safety of credit card use, you should call the official hotline of ICBC to report the loss immediately after you find the credit card lost, and then you can choose to reissue a new card or cancel it directly.

If it is convenient, it is best to go to the counter in person to reduce the complexity and insecurity of the procedure. However, when you cancel the card, you may have to settle all kinds of accounts owed by the card, such as debt, loss reporting fee, annual fee and so on. Otherwise your credit will be affected.