After opening the CCB App, click the balance query button to enter the login interface, and then complete the login verification to enter the home page;

Tips: It is recommended to enable fingerprint login or pattern login;

After entering the home page, click the credit card icon at the bottom;

After opening the credit card function, slide down to find the credit card management bar, and click the security lock icon below;

When the security lock function is turned on, the default is to turn off the lock, and click Yes to enable it.