Rural domestic sewage treatment pipe network projects in Huoshan Village, Qian 'ao Village and Xiaoxin Village of Taoyuan Street in Ninghai County were publicly invited for bidding in September, 1965 in Ninghai County Public Resource Trading Center, with a budget price of 4579 1 10,000 yuan.

This project started construction on February 6, 2065438. In the process of construction, due to the inconsistency with the design, the engineering quantity has changed.