Dau Tu Phat Trien Cong Nghe Va Xay Dung DHT Joint Stock Company Address: Hamlet 3, Yen So Commune, Hoai Duc District, Ha Noi City Enterprise code: 0105246628 Phone: 0934440255 Representative: Nguyen Van Dat Adress: Mai Thuong Hamlet, Mai Dinh Commune, Hiep Hoa District, Bac Giang Province Yen So Commune, Hoai Duc District, Ha Noi CityFounding date: 6 - 4 - 2011