If you delay repaying your China Merchants Bank credit card for a week, the following situations may occur:

1. Interest and late payment fees: Late repayment will result in interest and late payment fees. The bank will calculate corresponding interest based on the number of overdue days and the amount owed, and will charge a certain late fee as a default fee.

2. Damage to your credit record: The bank will report overdue records to the People's Bank of China's personal credit information basic database (referred to as "Central Bank Credit Information"), which will have a negative impact on your personal credit record. A bad credit record may affect your future applications for loans, home purchases, rentals, etc.

3. Collection actions: Banks will take collection measures to recover overdue amounts. They may contact you by phone, text, or email and ask you to pay off the balance as soon as possible. If you still fail to repay, the bank may use a third-party collection agency or take legal action to recover the debt.

Summary: Overdue repayment of China Merchants Bank Credit Card will result in increased interest and late payment fees, damage to personal credit record, and may face collection actions from the bank.

Extended information: Overdue repayment is a behavior that credit card users should try to avoid. It is recommended to repay on time to maintain a good credit record. If you have any difficulties, you should contact the bank promptly and inquire about possible solutions, such as applying for installment payment or negotiating to adjust the repayment plan.