Truong Trung Hoc Co So Hoi Hoan Address: Ban Kia Hamlet, Hoi Hoan Commune, Van Lang District, Lang Son Province Enterprise code: 4900410623 Phone: 02053780447 Adress: Van Lang District, Lang Son Province Hoi Hoan Commune, Van Lang District, Lang Son ProvinceFounding date: 21 - 10 - 2009