Modify via mobile banking. Open the China Construction Bank Mobile Banking APP and click "Credit Card Service Card Limit Modify Now". Change via online banking. Open China Construction Bank Online Banking and click "Credit Card Service Card Limit Modify Now". Contact customer service for modification. Contact CCB’s customer service staff by phone or online, explain the situation to them, ask them how to modify the limit, and then follow the customer service staff’s instructions to perform the corresponding operations. In addition, you can also solve the limit problem by applying to increase the daily limit, using other bank cards or payment methods, handling large-value transfers, and using bank counter services. Please note that increasing the daily limit needs to be reviewed by China Construction Bank, and the limits and handling fees for different payment methods and businesses are different, so the choice should be made based on the actual situation. If you are not sure how to operate, it is recommended to consult the staff of China Construction Bank.