Tu Van Thiet Ke Xay Dung Dong Son Joint Stock Company Address: No 85, Alley 85/42, Lane 85, Ha Dinh Street, Thanh Xuan Trung Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0102525253 Phone: 0912111426 Representative: Ho Chuong Thanh Xuan Trung Ward, Thanh Xuan District, Ha Noi CityFounding date: 21 - 11 - 2007