Phat Trien Cong Nghe Va Xay Dung Hoang Ha Joint Stock Company Address: No 9B, Lane 41, Bui Xuong Trach Street, Khuong Dinh Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0102308139 Phone: 0245595948 Representative: Dang Ba Khai Khuong Dinh Ward, Thanh Xuan District, Ha Noi CityFounding date: 5 - 7 - 2007