I Do Funerals and Communicate with Ghosts and Gods

Urban fantasy + weird rules + funeral culture + emotional redemption. The protagonist, Jiang Chaosheng, a mortician who is forced to inherit the family legacy, unexpectedly awakens as a "spiritual bearer" and can see the obsessions of the deceased and help them fulfill their unfulfilled wishes. But every time he "helps", he must abide by a set of weird "underworld rules" - if you violate the rules, you will be targeted by "it".