In pics: venues of 2022 Winter Olympic Games
2020-07-31 09:12:52 来源： Xinhua 责任编辑： 陈佳丽|
Photo taken on July 29, 2020 shows a tree with a QR code in Yanqing, located in the northern suburbs of Beijing, capital of China. In addition to the Olympic Village, all trees in the entire Yanqing competition zone were registered and had their profiles marked with a QR code. (Xinhua/Zhang Chenlin) |
