The reason is that different banks have different restrictions on the number of times the same credit card can be repaid through Lacarra in the current month. Specifically, a few banks such as ICBC, Agricultural Bank of China, Bank of Communications and Chengdu Rural Commercial Bank have no restrictions on the number of repayments; Guangfa Bank and China Construction Bank stipulate that the number of repayments on the same day cannot exceed 3 times, but it can be repaid multiple times in one month; There are also many banks that stipulate that the same credit card cannot be repaid more than three times a month. The customer service staff of China Merchants Bank also said that there are such regulations, the main purpose of which is to control risks. Moreover, according to the relevant regulations of the management department, "there is an upper limit on the daily repayment amount of a single card, which is 50,000 yuan".