More importantly, the closed toilet offers a better environment for both cities and villages, and a mode of green farming that the Chinese have long forgotten, added Ji.

• 冀说，更重要的是，这种密闭厕所还给城市和农村带来了更加洁净的环境，并且为中国人提供了一种他们早就忘却的绿色农业模式。