1. The credit line of China Merchants Bank is insufficient and has been used up. After repayment, it cannot be used again before the credit line is restored.

2. The amount of a single transaction, one day or one transaction channel of China Merchants Bank Credit Card is limited, and it needs to be split into multiple transactions or the next day's transactions, or it needs to be traded by another merchant.

3. Bank risk control, the credit card limit is frozen, and you need to contact the bank to apply for unfreezing.