Today, when human science and technology are highly developed, "demon" have not disappeared, but have penetrated into urban life in various forms - "ladder demons" that live in elevators and scare people, "bugs" that hide in central air conditioners in office buildings, and "road demons" that hide in underground parking lots and turn cars into mazes. Twenty years ago, the Dao Sect established the "Demon Spirit Management Bureau" to modernize the traditional demon collectors and formally integrate them into the government affairs system. Demon spirits are divided into five levels: S, A, B, C, and D based on difficulty alone. Demon collectors are promoted according to merit points. The lowest rank is "Blue Stone" (D-level demon collector), and the highest rank is "Tianshi" (S-level demon collector).
