I Can't See Ghosts and I've Become a Ghost.

There are ghost missionaries in the underworld, who are responsible for reincarnation in the underworld and maintaining the order of the dead souls; and in the upper world, there are also people who perform their duties, called "soul-hunting missions". About eighteen years ago, for unknown reasons, a crack suddenly opened in the depths of hell and connected to the human world. Yin energy and resentful souls leaked out, endangering all living beings. Emperor Fengdu then sent down a ray of projection, went to the human world in person, secretly discussed with the high-level people in the human world, and finally jointly established the "Soul Chasing Division". The members of the company are called "hundred soul hunters". Ghosts will extradite a trace of pure hell-origin ghost energy to refine their physical bodies and start the path of ghost cultivation, thereby gaining the power to hunt down escaped ghosts in the human world, performing the duties of ghosts, and guarding the balance of yin and yang.