With a total contract value of RMB 190 million, the project will complete 19.3km sewage collection main pipelines with a diameter of DN600-1500, treating sewage from Bazhong Economic Development Zone in a specialized treatment plant. The whole project includes 13 pipe bridges with a maximum height of 38m and longest length exceeding 200m, 353 bilge wells, two back-siphon wells, four concrete supports, 1,500-odd-meter retaining wall, 1,370-odd-meter shotcrete and rock bolt support, 2,125-meter inverse V-shaped slope protection, and 671-meter catchwater.