If it is a China Merchants Bank credit card, your company name, mobile phone number, work phone number, and home phone number need to be modified. If you have our professional version, you can log in to the credit card interface and find Customer Management-Data Modification; if To maintain the billing address, operate in Account Management-Billing Address Settings; if you want to change your EMAIL address, you can log in to the Professional Edition, Customer Management-EMAIL Address Settings Modification, if you do not have the Professional Edition, you can call our customer service hotline---enter Account opening ID number #----The system enters the verification process---9 enters the manual process and will verify your identity and modify it.