Editor's note: In order to ensure sustainable development, the Yanqing competition zone of Beijing 2022 has adhered closely to the concept of a "green Olympics," as well as the concept that lucid waters and lush mountains are invaluable assets, throughout the entire process of venue construction.

At present, the ecological restoration of the 2.16 million square meters of the Yanqing competition zone has been completed. China.org.cn look back at some highlights which reflects Yanqing's core design concepts of "venues built among mountains and forests for an ecological Winter Olympics."