Aerial photo taken on April 16, 2019 shows spring scenery on the bank of Lianxi River in Daoxian County, central China's Hunan 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)