1. If you are locked up in a black room, you must maintain a good repayment record, avoid any violations, and try to use China Merchants Bank credit cards in small amounts and multiple transactions.

2. Reject any irregular credit card payment method and apply for a credit limit from the bank to solve the black room. If your personal debt is too high, find a way to reduce your debt and keep your credit card bill at 50 %about.

3. Generally speaking, being locked up in a black room is mostly caused by personal debt and irregular credit card use. If you reduce your debt and maintain standard credit card use for about three months, you can basically get out of the black room.