Modern society has forgotten the traditional "contract of observance of customs", causing the "vulgar spirits" (evil spirits nourished by the collective awe of mankind) born in reliance on taboos to lose their restraints and shift from a "suppressed state" to a "hunting state." Abandoned folk customs in different regions correspond to different folk spirits - the "water sacrifice spirits" in the water towns, the "house folk spirits" in the city, and the "coffin burial spirits" in western Hunan. They feed on "those who violate taboos", and "traditional craftsmen" (papermakers, carpenters, Feng Shui masters, etc.) Are the only group that can renew the contract through traditional crafts. Lin Ye is the name given to him by his grandfather. His grandfather chose it to mean "Observe customs at night and rest in peace during the day" because customary papermakers need to deal with secular affairs at midnight when the yin energy is strongest. The word "Ye" is not only a professional brand, but also an expectation for him to "continue the mission of keeping customs."