CHONGQING, March 17 (Xinhua) -- Guangyang Isle, the most extensive green island in the upper reaches of the Yangtze River, has been turned into an ecological restoration and protection "classroom" for ecotourists and school children.

The local ecosystem and biodiversity were once seriously threatened due to real-estate projects in the area. However, the local government brought harmful projects of this sort to a halt in 2017, starting the restoration of the environment on the island.