Khai Thac Khoang San Tam Son Joint Stock Company Address: No 26 Trung Kinh, Trung Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0109766402 Phone: 0913324862 Representative: Ta Minh Son Trung Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 6 - 10 - 2021