When giving their age to foreigners, South Koreans typically say two numbers. Their "international age," or the number of years since they were born, and their "Korean age," which could be one -- or even two -- years higher.
원문출처 : https://www.cnn.com/2019/06/03/health/south-korea-age-law-intl/index.html
원문출처 : https://www.cnn.com/2019/06/03/health/south-korea-age-law-intl/index.html