Dafangying Reservoir is located at the Sili Branch of Nanfei River. The upstream catchment area is 184km². This project includes river dredging, wetland design around the reservoir, water resource conservation forest planting design, water quality monitoring system design, water resource protection zone management plan etc. This project is the important part of the Chao Lake ecology rehabilitation and restoration project. As the location of the Dafangying Reservoir is at the upstream of the Chao Lake, this project could significantly reduce pollution entering the Chao Lake and improve the water quality in the water resource protection zone.