article_snippet: Yoo's company, SJ Tech, operates out of Kaesong, which is just north of the Demilitarized Zone in North Korean territory.
article_snippet: Yoo's company, SJ Tech was referring to South Korea monthslong closure of Kaesong in 2013, during a period of heightened tension on the divided Korean peninsula.
article_snippet: SJ Tech's Yoo Chang-geun.
article_snippet: Kaesong is the last living legacy of the Sunshine Policy," says professor Delury of Yeonsei University.