The 400-009-5555 mentioned in your question is indeed the phone number of China Merchants Bank Credit Card Center. If you are not sure, you can also call these numbers to confirm. Of course, you are a different credit card holder of China Merchants Bank, and you can choose different telephone lines:

1. China Merchants Bank's 24-hour credit card service hotline: 400-820-5555, which is a customer service hotline that all credit card customers of China Merchants Bank can call;

2. 24-hour service hotline of China Merchants Bank's commercial credit card: 400-820-5558, which is the customer service hotline dialed by China Merchants Bank's commercial credit card customers;

3. China Merchants Bank Black Gold Credit Card VIP 24-hour service hotline: 400-988-9888, which is the customer service hotline dialed by China Merchants Bank Black Gold Credit Card VIP;

4. China Merchants Bank Unlimited Credit Card VIP 24-hour service hotline: 400-800-0888, which is the customer service hotline dialed by China Merchants Bank Unlimited Credit Card VIP;

V. China Merchants Bank Express Platinum Credit Card VIP 24-hour service hotline: 400-809-5555, which is the customer service hotline dialed by China Merchants Bank Express Platinum Credit Card VIP;

6. China Merchants Bank Platinum Credit Card VIP 24-hour service hotline: 400-888-5555, which is the customer service hotline dialed by China Merchants Bank Platinum Credit Card VIP;

Seventh, when calling China Merchants Bank's credit card customer service hotline overseas, you need to add an international prefix such as +86 before the phone number.