This project is to renovate the environment of 274 villages in 8 townships in Yunxiao County, including rural domestic sewage treatment project and rural domestic sewage collection project. A total of 206 sewage treatment stations will be built, which will be treated by multi-stage contact oxidation process, and 18 The standard of the constructed sewage treatment station is included in the operation management; the sewage in Changshan Overseas Chinese Economic Development Zone is treated, 10 sewage treatment stations are built, the pipeline network is about 10 kilometers, the total scale of sewage treatment is 375t/d, mainly involving 4 in the zone Sewage collection and treatment in administrative villages.