Chinese President Xi Jinping's special envoy Han Zheng (L), also a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, is welcomed by South Korean President Moon Jae-in and his wife before a pre-opening ceremony reception of the PyeongChang Winter Olympics in PyeongChang, South Korea, Feb. 9, 2018. (Xinhua/Yao Dawei)