Hello, there are several possibilities for this. First, the bank believes that it should be considered from the perspective of card safety. After all, the credit line is getting higher and higher now. If tens of thousands of people steal at a time, it will be quite uncomfortable. Then, these merchants may have the problem of cashing out, or the bank thinks it is very likely to do this gray business, which will cause them greater losses. Specifically, it is most convenient for you to call the customer service phone of the bank and ask, and by the way, you may directly raise the amount.