What does it mean that the Network Bad and Spam Processing Center sends a dynamic verification code?

I need to verify my identity when logging in to 1232 1 Network Bad and Spam Reporting Acceptance Center, which is beneficial to protect the security of my account. I will send a dynamic verification code, which usually expires after more than 60 seconds.

Hereinafter referred to as "1232 1 reporting center", internet society of china is a reporting agency entrusted by the Ministry of Industry and Information Technology. Responsible for assisting the Ministry of Industry and Information Technology to accept, investigate, analyze and investigate bad and junk information in various forms of information communication networks and telecommunications services such as the Internet, mobile telephone networks and fixed telephone networks.