Duy Tan Address: 21 Nam Ngu, Cua Nam Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0101213981 Phone: 0248222357 Representative: Do Thi Phuong Adress: 31/8 Nguyen Thiep, Dong Xuan Ward, Hoan Kiem District, Ha Noi City Cua Nam Ward, Hoan Kiem District, Ha Noi CityFounding date: 15 - 3 - 2002