Staff of a boat restaurant on the Taedong River line up at the entrance as they wait to greet customers Sunday, June 18, 2017, in Pyongyang, North Korea. The boat is berthed along the river, which is the fifth longest river on the Korean Peninsula and runs through the country's capital, Pyongyang. (Photo by Wong Maye-E/AP Photo)

Students wearing masks rest amid the coronavirus disease (COVID-19) pandemic in Seoul, South Korea, August 25, 2020. (Photo by Kim Hong-Ji/Reuters)

A man runs to help a woman as they attempt to shelter in a locked convenience store during heavy wind and rain as typhoon Maysak hits the Haeundae Beach area of Busan, South Korea, on September 3, 2020. Flights were grounded in South Korea and storm warnings issued on both sides of the Korean peninsula as a typhoon forecast to be one of the most powerful in years made its approach. (Photo by Ed Jones/AFP Photo)

In a photo taken on November 4, 2020 visitors wearing traditional Korean hanbok dress walk beneath yellow ginko leaves in a courtyard at Gyeongbokgung palace in Seoul. (Photo by Ed Jones/AFP Photo)

A student wearing a face mask prays before the start of the annual college entrance examination amid the coronavirus pandemic at an exam hall in Seoul, South Korea, Thursday, December 3, 2020. South Korean officials are urging people to remain at home if possible and cancel gatherings as about half a million students prepare for a crucial national college exam. (Photo by Kim Hong-Ji/Pool Photo via AP Photo)

An employee dressed in a Santa Claus costume plays with cats at the Catgarden in Seoul, South Korea, December 14, 2020. (Photo by Kim Hong-Ji/Reuters)

This picture taken on January 14, 2021 and released from North Korea's official Korean Central News Agency (KCNA) on January 15 shows Pak Jong Chon, chief of the General Staff of the Korean People's Army, during a military parade celebrating the 8th Congress of the Workers' Party of Korea (WPK) in Pyongyang. (Photo by KCNA via KNS/AFP Photo)

A soldier walks on the bank of the river in central Pyongyang, North Korea on April 16, 2017. (Photo by Damir Sagolj/Reuters)