Why does Shanghai Pudong Development Bank say that it can verify whether the mobile phone number has been authenticated by my real name?

Real name authentication system. Shanghai Pudong Development Bank cooperates with communication operators or accesses the national identity authentication system, and can query the relevant real-name authentication information through the mobile phone number to verify whether the mobile phone number belongs to me. Shanghai Pudong Development Bank has its own real-name authentication system, which can verify the identity of users through mobile phone numbers and other information.