South Korean President Moon Jae-in (3rd R), Kim Yong Nam (5th R), president of the Presidium of the Supreme People's Assembly of the Democratic People's Republic of Korea (DPRK), and Kim Yo Jong (4th R), the younger sister of top DPRK leader Kim Jong Un who serves as the first vice director of the Central Committee of the ruling Workers' Party of Korea, watch a concert performed by a 140-member DPRK art troupe in Seoul, South Korea, Feb. 11, 2018. (Xinhua/Newsis)