When spring comes, the nature looks much more alive as the trees get covered in full colorful blossoms, Damavand, east of Tehran, Iran, May 7, 2020. IRNA

Firefighters take part in the "Thank-you Challenge" at a fire station in Cheongju, 137 kilometers south of Seoul, on May 7, 2020.

An official of the Hanbok Advancement Center check displays of school uniforms that use modern designs based on "hanbok," traditional Korean clothes, at a gallery in Seoul on May 7, 2020.

A son waves to his mother from behind a glass panel at a senior care facility in the central city of Daejeon on May 7, 2020, as he meets her without person-to-person contact one day ahead of Parent

Volunteers prepare emergency relief kits packed with basic necessities, like instant food, at an office of the National Red Cross in Seoul on May 7, 2020, for delivery to migrant workers from overs

The head of Seoul's Seodaemun Ward, Mun Seok-jin, takes part in the "Stay Strong" campaign on May 6, 2020, which aims to bolster social morale and the confidence of people amid the ongoing novel co

People take a walk at a lake park in Seoul on May 6, 2020, when people's everyday lives cautiously returned to normal based on self-disciplined quarantine amid the slowing of COVID-19 outbreak.

Carnations are on sale at a flower market in Seoul on May 6, 2020, two days before Parents' Day.

A weekly "comfort women" rally is live streamed in front of the Japanese Embassy in Seoul on May 6, 2020, calling for the Japanese government to apologize for its wartime sexual slavery.

This photo, provided by Korea Astronomy and Space Science Institute (KASI) on May 6, 2020, shows a rendering of a satellite that the science ministry and KASI will launch next year to observe near-