It didn't work. According to the relevant public information, the credit card quota of 30,000 yuan means that you can use 30,000 yuan under normal circumstances, that is, you can use the credit card according to the normal use scope of the credit card and repay it on time before the repayment date, which has no other influence. Credit card refers to various media that record the relevant information of the cardholder's account, have the function of bank credit line and overdraft, and provide relevant banking services for the cardholder.