Dau Tu Xay Dung Thanh Van Lang Son Joint Stock Company Address: Khu Tai Dinh Cu Khoi 9, Dong Kinh Ward, Lang Son City, Lang Son Province Enterprise code: 4900214322 Phone: 0912191690 Representative: Trinh Kim Van Adress: No 06, Hoa Binh Street, Khoi 1, Tam Thanh Ward, Lang Son City, Lang Son Province Dong Kinh Ward, Lang Son City, Lang Son ProvinceFounding date: 18 - 3 - 2002