The photo album depicts a number of eye-catching photos of a museum in the Iranian Gazvin Province. May 19, 2020. IRNA/ Naser Nili

Quarantine officials disinfect the cafeteria at a high school in the southwestern city of Gwangju on May 19, 2020, one day before schools reopen for high school seniors after a spate of delays due

Dilly Tower, a food delivery robot, begins trial service at Woowa Brothers Corp.'s main office in eastern Seoul on May 18, 2020.

This photo, provided by the Kim Dal-jin Art Archives and Museum on May 18, 2020, shows a painting set to be displayed at the art center in Ulsan, 414 kilometers southeast of Seoul.

This undated photo, provided by the Suwon Culture Foundation, shows a night view of the Hwaseong Haenggung Palace in Suwon, south of Seoul.

Firefighters use a hose to extinguish an imaginary fire during a firefighter contest in the central city of Daejeon on May 18, 2020. (Yonhap)
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Lee Sung-hee, chairman of the National Agriculture Cooperative Federation, and a group of university students participate in an event at a paddy of the Museum of Agriculture in Seoul on May 18, 202

President Moon Jae-in (L, front) and his wife Kim Jung-sook (R, front) salute the national flag during an annual ceremony at a plaza in front of the former building of the South Jeolla provincial g

Oh Jun-hyeok (R) of the SK Wyverns flips his bat after hitting a solo home run against the NC Dinos in a Korea Baseball Organization game at SK Happy Dream Park in Incheon, southeast of Seoul, on M

The South Korean government delivers 40,000 facial masks for Thai Korean War veterans and a veterans' organization in a ceremony at the Korean Embassy in Bangkok on May 15, 2020. (Yonhap)