He recommended a novel where the main character was a martial arts master in a mountain village. The mountain village was isolated from the world and had three wives.

A novel. The main character was a martial arts expert in a mountain village. The mountain village was isolated from the world. It seemed that during the Song or Tang Dynasties, he took root in the mountains to avoid war. The main character had three wives and a mother. The first time the main character left the village, he met his first wife driving a car and almost hit the main character. The main character had never seen a car before and thought it was a monster. The protagonist still had long hair (not braids). The protagonist seemed to have brought his three wives back to the mountain village. He vaguely remembered that there was a pair of twin old men in the novel who knew martial arts. Not a martial arts expert.
It seemed that one of the later chapters was about a duel with someone else in the arena.

Answer 1

I recommend the book 'Hiding in the Mountain Village' to you. The main character was a martial arts expert from a mountain village. After inexplicably coming to a parallel world, he returned to his hometown and lived a simple life. He earned money by singing Earth songs and then developed the village. This book was relatively light, but it was very relaxing and enjoyable to read. Moreover, the main character did have three wives. I hope you will like this book.