Contract works: 1, clean industrial plant engineering, electronic engineering plant clean, cosmetics plant decontamination, fiber-optic communications engineering plant clean, clean silk plant engineering, screen printing plant cleansing works; 2, 高标准 purification plant engineering, pharmaceutical clean engineering, food plant cleansing works, clean drinking water plant canning plant engineering; 3, laboratory projects, sterile laboratory, biological laboratories, laboratory decontamination overall planning and design and construction; 4, contract central air conditioning, clean installation in the field of engineering equipment , commissioning and maintenance, maintenance; 5, factories, workshops, laboratories clean air-conditioning engineering, clean room engineering, clean room renovation project; 6, industrial plant engineering interior wall, ceiling engineering, ground engineering, other scattered projects.