Tu Van Kien Truc Va Dich Vu Xay Dung Yen Yen LTD Address: No 1C Trang Tien, Trang Tien Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0101328421 Phone: 0249331955 Representative: Bui Hai Yen Adress: No 1C, Trang Tien Street, Trang Tien Ward, Hoan Kiem District, Ha Noi City Trang Tien Ward, Hoan Kiem District, Ha Noi CityFounding date: 27 - 1 - 2003