Tu Van Thiet Ke Kien Truc Polygon Joint Stock Company Address: No 83D, Lane 344, Ngoc Thuy Street, Ngoc Thuy Ward, Long Bien District, Ha Noi City Enterprise code: 0104473201 Phone: 0985919643 Representative: Luu Quang Vu Adress: No 4a, Le Thanh Tong Street, Phan Chu Trinh Ward, Hoan Kiem District, Ha Noi City Ngoc Thuy Ward, Long Bien District, Ha Noi CityFounding date: 9 - 2 - 2010