Li Xinggang (2nd L), chief designer and chief architect of the Yanqing Competition Area of Beijing 2022 Winter Olympics; Yan Chunhua (3rd L), principal of Lanzhou University and academician of the Chinese Academy of Sciences; Li Hejun (3rd R), professor at the College of Materials, Northwestern Polytechnical University; Wei Baogun (2nd R), chief scientist of the China Electronics Technology Group Corporation. [Photo/Xinhua]