The credit line of China Merchants Bank is the available credit line of China Merchants Bank and the maximum credit line you can use. If you are not satisfied with your approval quota, you can of course apply for adjustment (promotion).

The reasons for your credit card withdrawal failure of China Merchants Bank may be:

1. Your credit card of China Merchants Bank has been used for less than half a year;

2. Your China Merchants Bank credit card has a limited number of purchases and a limited amount;

3. Your credit card consumption types of China Merchants Bank are not diverse enough;

4. Your CMB credit card repayment is not timely enough, or even overdue, leaving a bad credit record;

5. Occasionally, your credit card of China Merchants Bank is not withdrawn normally or in installments.

You can review your previous use of China Merchants Bank's credit card to see if there is such a phenomenon. I hope it will help you.