A volunteer pins a carnation on the clothes of a senior citizen at a welfare center in Daegu, 300 kilometers southeast of Seoul, on May 7, 2021, one day ahead of Parents' Day. (Yonhap)

Citizens buy carnations for their parents at a flower market in Seoul on May 6, 2021, two days ahead of Parents' Day. (PHOTO NOT FOR SALE) (Yonhap)
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Office workers rest along the Cheonggye Stream in downtown Seoul during lunchtime on May 6, 2021 as the country enters an early summer. (Yonhap)
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Visitors look at paper lanterns lit up during a festival on traditional Korean paper at a theme park in Wonju, Gangwon Province, northeastern South Korea, on May 3, 2021.

Musicians play Korean instruments at a concert at Deoksu Palace's Seokjo Hall in Seoul on May 3, 2021. The events runs until May 9. (Yonhap)
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A pharmacist shows a COVID-19 self-test kit made by local drug developer Humasis at a drugstore in Seoul on May 3, 2021, when such test kits were allowed to go on sale. (Yonhap)
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Visitors try to make Joseon Dynasty (1392-1910) incense pouches at the seventh Royal Culture Festival at Changdeok Palace in Seoul on May 3, 2021.

Students of Yeungnam University from foreign countries take part in a farming event to plant rice in Gyeongsan, North Gyeongsang Province, southeastern South Korea, on May 3, 2021. (Yonhap)

People view a simulated sunrise on an LED screen at the K-pop Square of the COEX convention center in Seoul on May 2, 2021.

Fishing boats take part in a sea rally using fishing boats in waters off a port in Hwaseong, Gyeonggi Province, on South Korea's west coast on April 30, 2021, as the National Federation of Fisherie