Thanh Duyen Address: 42, Dinh Tien Hoang, Chi Lang Ward, Lang Son City, Lang Son Province Enterprise code: 4900218944 Phone: 0205811829 Representative: Tran Van Duyen Adress: No 8, Hoang Dieu, Chi Lang Ward, Lang Son City, Lang Son Province Chi Lang Ward, Lang Son City, Lang Son ProvinceFounding date: 26 - 8 - 2002