Dau Tu Xay Dung Va Thuong Mai Lang Son Joint Stock Company Address: No 39, Khoi Dai Thang, Chi Lang Ward, Lang Son City, Lang Son Province Enterprise code: 4900660817 Phone: 0976503334 Representative: Hoang Thi Hau Adress: Bac Hamlet, Yen Phuc Commune, Van Quan District, Lang Son Province Chi Lang Ward, Lang Son City, Lang Son ProvinceFounding date: 21 - 6 - 2011