Can I name myself? I don’t like the surname and first name on the household registration book. Is it considered cheating to tell everyone that I made up my name and call them Kai?

Hello poster, it is generally difficult to change the first name and last name once registered. If you really don’t like your real name, you can first tell others your real name when introducing yourself to others, and then tell others that I still prefer others to call me ***. For example: Hello, my name is *** , but in life I prefer others to call me *** so that there is no deception. Hope this helps.