A merchant hangs a ribbon carrying a phrase expressing thanks to a teacher on a carnation basket for delivery at a flower shop in Seoul on May 13, 2022, two days ahead of Teachers' Day.

Elementary school pupils attired in traditional Korean outfits bow as they take part in the enactment of a rite at Guam Seowon, a Confucian academy from the 1392-1910 Joseon Dynasty, in the southea

Traditional dancers perform in front of the illuminated Heungnyemun gate at Gyeongbok Palace in Seoul on May 10, 2022, as part of the opening event of the Royal Culture Festival. (Yonhap)

President Yoon Suk-yeol (front) is sworn in as South Korea's new president during his inauguration ceremony in front of the National Assembly in Seoul on May 10, 2022. (Pool photo) (Yonhap)

Police officers open the doors on Chunchu Gate at Cheong Wa Dae, the former presidential office, in Seoul on May 10, 2022, during an event to mark the opening of a trail to Mount Bukak just behind

President Moon Jae-in (L) and first lady Kim Jung-sook wave as they leave the presidential office of Cheong Wa Dae in Seoul for the last time as the first couple on May 9, 2022. (Yonhap)

The Polish National Constitution Day of Poland and the 80th anniversary of the Polish refugees arrival in Iran during World War II were held in the presence of Polish Foreign Minister Zbigniew Rau,

Seen here is the building of the defense ministry in Seoul on May 9, 2022, one day before President-elect Yoon Suk-yeol starts his five-year term.

This photo taken May 8, 2022, shows lit paper lanterns during a festival on traditional Korean paper at a theme park in Wonju, Gangwon Province, northeastern South Korea.

Supreme Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei received Syrian President Bashar al-Assad and held talks with him in Tehran, Iran, on Sunday evening. May 8, 2022. IRNA