Dau Tu Khai Thac, Che Bien Khoang San Viet Nam Joint Stock Company Address: No 118 M2 Huynh Thuc Khang, Lang Ha Ward, Dong Da District, Ha Noi City Enterprise code: 0102558227 Phone: 0247734126 Representative: Tran Van Chuong Adress: No 9, 175 To 41 Lane, Yen Hoa Ward, Cau Giay District, Ha Noi City Lang Ha Ward, Dong Da District, Ha Noi CityFounding date: 10 - 12 - 2007