Tu Van Xay Dung Vien Thong Ha Noi Joint Stock Company Address: Zoom 507B D4, Dich Vong Ward, Cau Giay District, Ha Noi City Enterprise code: 0101845130 Phone: 02462813833 Representative: Dang Viet Son Adress: Zoom 507B D4, Dich Vong Ward, Cau Giay District, Ha Noi City Dich Vong Ward, Cau Giay District, Ha Noi CityFounding date: 26 - 12 - 2005