We need to use Pay APP, which is specially used to manage Bank of Communications credit cards. After entering the application, click My in the lower right corner, and then you can find the login option in the upper left corner of the corresponding page. You can see your name and avatar after logging in. There is also a gear-shaped setting icon on the top left of the avatar, and we need to click it. Then we will jump to the system settings interface and click Payment Settings-Card Payment Management in the interface. Then click the transaction settings on the new page, and you can find the one-button card locking function. We just need to turn on the switch on the right side of this function, and then click OK to lock this card in the pop-up window, so that even if others find this card, they can't use it.

If the credit card is lost, there is a risk of being stolen. After all, many cards now have the function of small confidential payment. Once our card is lost, we must lock it first, so as to ensure the safety of funds to the maximum extent.