What should I do if I meet an ID card with the same name and surname and the same ID number?

Your own things will not become others. Having the same name and surname is not a problem. It is always mainly the public security department that makes a mistake. You can't wait. It is suggested that you go to the public security department to change your ID number immediately, and then correct your bank information, telecommunications information, student status information, household registration information, property rights information and so on.