There are night shifts. Relevant public information shows that in order to speed up the construction progress, workers are required to work at night in Dongguan, and the state stipulates that the night construction time is from 22: 00 pm to 6: 00 the next day. According to Article 30 of the Law on the Prevention and Control of Environmental Noise, nighttime construction is restricted, and the noise cannot exceed 70 decibels.