Xi Jinping, general secretary of the Central Committee of the Communist Party of China and Chinese president, and his wife Peng Liyuan, accompanied by Kim Jong Un, chairman of the Workers' Party of Korea and chairman of the State Affairs Commission of the Democratic People's Republic of Korea, and his wife Ri Sol Ju watch a large group callisthenics and art performance at the May Day Stadium in Pyongyang June 20, 2019. (Xinhua/Yan Yan)