Can China ancient adult men shave their heads?

Your question is a bolt from the blue.

The ancient tools were not developed, so it seems a little difficult to get a flat head. It was troublesome and unsightly to keep cutting hair at that time.

So for a long time, everyone has long hair, which has become a traditional, cultural and social phenomenon over time.

Even if the tools are sharper later, people have formed this habit, which is hard to change, so of course you can shave your head, but people rarely or never shave their heads, just like you have long hair or shaved your head now, it won't last long, because everyone doesn't shave.