What happened when I received the short message of Beijing unified identity authentication?

The verification code is used to register the unified identity of Beijing.

For the convenience of citizens, online registration is required before logging on to the official website of Beijing government agencies for online business. After Beijing unified identity authentication, you can use the same registered account (identity) to log in different government offices in official website. When Beijing unified identity registration and authentication, it is generally required to provide your own mobile phone number. The verification code sent by the platform to the mobile phone is to verify whether this mobile phone is for your own use, so as to verify whether your personal identity information is true.