Thong Xuan Address: Nga Tu Hamlet, To Hieu Commune, Binh Gia District, Lang Son Province Enterprise code: 4900462928 Phone: 02053834295 Representative: Nguyen Van Thong Adress: Nga Tu Hamlet, To Hieu Commune, Binh Gia District, Lang Son Province To Hieu Commune, Binh Gia District, Lang Son ProvinceFounding date: 21 - 12 - 2009