I Am Party B in Guaitan

His name is Qin Yu, and he is the best ferryman in the city - he can't kill ghosts, he can only bargain. If the negotiation is successful, you can earn karma points by freeing the resentful spirit; if the negotiation fails, if the possession points are full, you can directly switch to another person to live in. It wasn't until he met the resentful ghost who would "bid" with him that he discovered: It turns out that ghosts also have to have professional ethics, and the supernatural in the whole city is a big business.