Mu Yi is from Lin Dynasty.
Yes, according to modern people, he should have been an "ancient man", but because of certain "time, location, and people", he traveled through modern times, but he was content and quiet, living his life quietly, understanding the world, and learning to integrate into the world.
He worked a simple job, went out for a walk in his free time, and met all kinds of people. Sometimes he would meet "fellow travelers" and he would chat with them about his dynasty and stories. Although they were always treated as stories, he was willing to share them. Because he is also afraid, he is afraid that if he does not recall it for too long, he will forget those people and things about Lin Dynasty that once existed in his life. Or one day, when he woke up, he began to feel that what had happened might have been his dream, some ridiculous fabrication.
Purpose: No matter where you are, no matter whether you go back or not, you should live a good life.