Hoi Chu Thap Do Huyen Trang Dinh Address: Khu 1, That Khe Town, Trang Dinh District, Lang Son Province Enterprise code: 4900372840 Phone: 02053883231 Adress: Trang Dinh District, Lang Son Province That Khe Town, Trang Dinh District, Lang Son ProvinceFounding date: 31 - 8 - 2009