There are various ways of cultivation for all things in the world. There is a type of people who rely on the salvation of their souls to accumulate good deeds to practice in order to achieve the goal of attaining the truth. These people are called soul-saving people. Some of the descendants of the soul-duling people had no interest in cultivation, and then used the abilities they learned to make a living by driving away the souls of strangers who were nostalgic for the world. They gradually broke away from the soul-duling people completely and formed their own sect called spirit exorcists, commonly known as "ghost exorcists". The fallen among the soul savers and soul chasers became soul catchers, specializing in capturing souls contaminated with resentment to refine secret medicine and increase their cultivation skills.
Xianxia and the like don't seem to count -_-||