The path of spiritual practice consists of hundreds of practices and hundreds of arts. Some people are good at martial arts fighting, some are good at refining elixirs, some like to draw talismans, some like to make utensils... There is also a type of monks who are good at deducing exercises.
This type of acting master is also known as
"The elder who passes on the merits". Fu Henghua, after time travel, performed and taught martial arts for the Fu family, and lived a peaceful life as a bookworm.
But because his grandfather was about to die, he had to leave the island to plan his and his grandfather's path to immortality.