The substitute soul is the undead selected by the life messenger at the soul transfer station, so that it carries the body of the life messenger in the world, acts as the life messenger himself, works, takes care of the family and children, and does housework.
Because some of the substitute souls still have relatives in the yang world, or because of love, or because of economics, in order to take this opportunity to take care of or repay the relatives in the yang world, they do many absurd and bizarre things that are puzzling to ordinary people.
But within reason.
Some substitute souls also took the opportunity to find new fun. Or fight against injustice, or learn from ghosts to blow lamps, or ask ghosts for electric lights, or ask ghosts to grind millstones! Or create a gust of wind and pick up the bills someone is counting!
Some also remind some people to stay out of danger, or prevent pickpockets and thieves! (Remember the site URL: www.hlnovel.com