Truong Tieu Hoc Xa Yen Khoai Address: Long Dau Hamlet, Yen Khoai Commune, Loc Binh District, Lang Son Province Enterprise code: 4900357472 Phone: 02053845034 Yen Khoai Commune, Loc Binh District, Lang Son ProvinceFounding date: 30 - 7 - 2009