Aerial photo taken on Sept. 28, 2017 shows agricultural machineries working in fields at the Sanjiang Plain, northeast China's Heilongjiang Province. China has adopted the vision that lucid waters and lush mountains are invaluable assets and pursued a holistic approach to conserving its mountains, rivers, forests, farmlands, lakes, and grasslands. At the very highest levels, China is driving the way forward in the construction of an ecological civilization. (Xinhua/Wang Jianwei)