Thuong Mai Dau Tu Duc Son Joint Stock Company Address: No 207e, Tran Quang Khai Street, Chi Lang Ward, Lang Son City, Lang Son Province Enterprise code: 4900440089 Phone: 01238274199; 0838274199 Representative: Ma Dinh Thu Adress: No 207e, Tran Quang Khai Street, Chi Lang Ward, Lang Son City, Lang Son Province Chi Lang Ward, Lang Son City, Lang Son ProvinceFounding date: 7 - 12 - 2009