Truong Tieu Hoc Thi Tran That Khe Address: Na Nghieu Hamlet, Dai Dong Commune, Trang Dinh District, Lang Son Province Enterprise code: 4900364705 Phone: 02053883819 Adress: Trang Dinh District, Lang Son Province Dai Dong Commune, Trang Dinh District, Lang Son ProvinceFounding date: 10 - 8 - 2009