Thuong Mai Va Khai Thac Khoang San Hoang Son LTD Address: No 321, Au Co Street, Nhat Tan Ward, Tay Ho District, Ha Noi City Enterprise code: 0106459107 Phone: 0936389323 Representative: Doan Van Son Adress: Cat Lu Hamlet, Chi Dao Commune, Van Lam District, Hung Yen Province Nhat Tan Ward, Tay Ho District, Ha Noi CityFounding date: 17 - 2 - 2014