http://en.wikipedia.org/wiki/Koreans_in_Vietnam
According to Chang Keun Lee of the Korean Chamber of Commerce and Industry in Vietnam, Koreans formed the country's second-largest group of expatriates, with only the Taiwan expatriate community being larger; he estimated that half lived in Ho Chi Minh City.[14] Statistics from South Korea's Ministry of Foreign Affairs and Trade show that their population has grown by roughly thirty times in just a decade. Their population more than trebled from 1,788 in 1997 to 6,226 in 2003, then jumped to more than eight times that size—53,800—by just four years later. [1][2] The country's first school for South Korean nationals, the weekend Hanoi Hangul School, was founded on 1 March 1996, enrolling 122 students at the kindergarten through middle school levels); two Korean day schools were also later established, one in Ho Chi Minh City (founded 4 August 1998, enrolling 745 students at the kindergarten through high school levels), and a smaller one in Hanoi (founded 13 July 2006, with 63 elementary-level students).[15][16][17]