That record value is the server address

This is it, just modify the record value to your server address

You should resolve the server IP to your server. So you should add an A record, and the host record of this A record is yours

Third-level domain name (www in www.baidu.com), the recorded value is your server IP. After setting it up, just make it effective.

Also, your host record must be declared on your server, otherwise if the outside world finds your host, your host will not be able to return the correct value.