The fact that the bank cannot be phased in is not necessarily a dark room.

The term "little black room" comes from China Merchants Bank's credit cards. One of the standards is that credit cards cannot be used for bill installments. If the CCB credit card cannot be used for installment, there is a dark room, that is, the credit card is under risk control.

If the temporary limit is not increased for a long time, and the bill installment cannot be carried out after the credit card is billed, it means that the credit card has entered a dark room, that is, the credit card has been controlled by the bank, and will be reduced and blocked. .