When doing catering, the exhaust fan is too loud due to too much fumes. Eating more people talking and screaming. Not only has an impact on environmental pollution. Also makes people very uncomfortable. So there are residents upstairs stores, can not do catering. There are also catering stores, guests come, do not know when to go. Normal circumstances will be fine. Some people drink endlessly. Speaking without regard for others, it will affect the rest of others.