1.Environmental Protection Engineering 2.Waste water Treatment and Reuse 3.Treatment of City and Pure Water 4.Pruification of River and Wetlands Construction 5.Disposal and Treatment of Wastes 6.Resource of Wastes 7.Sampling and analysis of Environment 8.Underground Piping Engineering 9.Concrete Mixing Engineering 10.Piping Engineering 11.Electrical Facility Installation 12.Garden, Landscape Engineering