1. Open the China Merchants Bank Credit Card APP installed on your mobile phone, click "My" and then log in to your account.

2. After logging in to your account, click on the "Security" item on the page .

3. There are four toolbars in the middle of the "Security Center" page. The first one is "One-click Lock Card", click to enter.

4. All credit cards bound to the account will be displayed. Slide the "Lock" button in the lower right corner of the credit card you want to set to the right to lock it successfully.

5. In addition, on the "One-Click Card Lock" page, you can separately set some functions that need to be locked. Click "Settings" in the upper left corner of the credit card.

6. Here you can distinguish between domestic, overseas, card-less and card-swiping transactions. , set individual or multiple function locks respectively, and click "Save" in the upper right corner after setting.