Therefore, he ordered the local government of Haeju, Hwanghae to allow Lý Long Tường and his crew to live in a manor in a nearby countryside.

Lý Long Tường became the patriarch of the Lee family of Hwasan, Ongjin-gun after helping stave off the Mongol invasions of the Goryeo Kingdom twice.

[6][8] Students from the Democratic Republic of Vietnam began going to North Korea to study as early as the 1960s, even before the formal establishment of Korean-language education in their country.

[10] The son of a former staff member in the Vietnamese embassy in Pyongyang, who also attended Kim Il-sung University between 1998 and 2002, gave an interview in 2004 with South Korean newspaper The Chosun Ilbo about the experiences he had while living there.

[11] Vietnamese migration to South Korea began later, but quickly grew to a much larger scale; their population consists mainly of migrant workers, South Koreans citizens that were born there of full or partially Vietnamese origin, and women introduced to local husbands through marriage agencies.

Migrants were mostly male and untrained and were employed in small and medium-sized companies in labour-intensive industries such as fishing and manufacturing.