Since March 12, all construction sites in the city (including housing construction, transportation, water supply, urban management and other construction projects, except emergency rescue projects) have been shut down for 4 days, and all site staff (including managers, laborers, security guards, cleaners, canteens, canteen and other service personnel) have received "4 days and 4 inspections" for nucleic acid detection.

During the shutdown period, each construction site should be disinfected on site, the spatial layout of epidemic prevention on site should be optimized, the organization methods such as construction management, material transportation and logistics should be reasonably adjusted, and epidemic prevention publicity and education should be carried out. After the results of "four days and four inspections" are all negative, they will return to work in an orderly manner after the on-site inspection by the supervision organization meets the requirements of safe production and centralized residence management.