Dau Tu Xay Dung Hoan Kiem LTD Address: No 21, 18 Vo Van Dung Lane, O Cho Dua Ward, Dong Da District, Ha Noi City Enterprise code: 0101666251 Phone: 02466802258 Representative: Duong Duc Quyen Adress: Cong Hien Commune, Vinh Bao District, Hai Phong City O Cho Dua Ward, Dong Da District, Ha Noi CityFounding date: 8 - 6 - 2005