Night Patrol Order

Lu Chen, a folklore graduate, works the night shift at a funeral home after graduation. An accident activates the Night Patrol Order left by his grandmother, granting him the ability to see 'rules'. It turns out that supernatural events in this world are not ghost stories but 'rule anomalies'—each has a hidden set of rules rooted in thousands of years of Chinese folk taboos. Don't turn around at night, don't answer when your name is called, don't stick chopsticks upright in rice... These taboos passed down by elders are not superstition but survival rules bought with lives by the ancients. Lu Chen joins the Night Patrol Department to handle such matters. His job is to discover, understand, and break the rules. But he soon finds that his grandmother's identity, the department's secrets, and the origin of the rules all point to one question—who set these rules in the first place? — Description from novelcodex.org