Khai Thac Khoang San Rong Do Joint Stock Company Address: No 12a, Ba Trieu Lane, Ba Trieu Street, Le Dai Hanh Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0103142775 Phone: 0945595858 Representative: Nguyen Van Minh Le Dai Hanh Ward, Hai Ba Trung District, Ha Noi CityFounding date: 6 - 1 - 2009