Truong Trung Hoc Co So Xa Long Dong Address: Long Hung Hamlet, Long Dong Commune, Bac Son District, Lang Son Province Enterprise code: 4900367079 Phone: 02053837404 Adress: Bac Son District, Lang Son Province Long Dong Commune, Bac Son District, Lang Son ProvinceFounding date: 18 - 8 - 2009