Graphene keeps people warm in open air at Beijing 2022
(WorldNews China)

BEIJING, March 6 (Xinhua) -- While watching victory ceremonies in Beijing`s Yanqing and Chongli, Zhangjiakou at Beijing 2022, one may wonder how the volunteers in thin uniforms endured freezing temperatures in these mountainous areas. Temperatures at these areas could drop well below zero but high-tech materials are able to keep volunteers warm even in thin...