Dau Tu Va Phat Trien Cong Nghe Dong Bac LTD Address: No 34a, Tran Phu Street, Dien Bien Ward, Ba Dinh District, Ha Noi City Enterprise code: 0101224888 Phone: 0247338538 Dien Bien Ward, Ba Dinh District, Ha Noi CityFounding date: 11 - 4 - 2002