Thanh Tra Huyen Trang Dinh Address: Khu I, That Khe Town, Trang Dinh District, Lang Son Province Enterprise code: 4900403640 Phone: 02053883077 Adress: Trang Dinh District, Lang Son Province That Khe Town, Trang Dinh District, Lang Son ProvinceFounding date: 7 - 10 - 2009