If you use the professional version of China Merchants Bank to pay, the payment amount of the professional version of the card is set by yourself, which can be set to "no limit" at most. After logging in to Professional Edition, click the horizontal menu Online Payment-Professional Edition Payment Function Application and Limit Setting, and click the "Modify" option to modify the professional edition payment limit through the opened interface. (Version 7.0 modification path: please click the horizontal menu "All-in-One Card"-"Online Payment"-"Professional Payment"-"Function Application" after logging in to the professional version, and click the "Modify" option to modify the payment limit of the professional version through the opened interface. ) Pay online after success. When choosing the payment method, pay attention to choosing "professional payment" instead of "card number password payment".