Dau Tu San Xuat Kinh Doanh Va Day Nghe Ngoc Son Joint Stock Company Address: No 2 De To Hoang, Cau Den Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0101281131 Phone: 0248682182 Cau Den Ward, Hai Ba Trung District, Ha Noi CityFounding date: 16 - 9 - 2002