Immortality******************

This system says that only highly qualified people can be accepted as apprentices, so only humans can be apprentices? Can't other races do it?

It's okay, but the protagonist Douwen Chaos was actually trapped under the Kunlun Mountains, which means that before the protagonist traveled across the world, Chaos must have been very strong, otherwise he wouldn't have been trapped under the Kunlun Mountains. .

If you don't understand the author's thinking, would you be better off imitating others?