Xay Dung Vien Thong Thang Long Joint Stock Company Address: Zoom 303, Nha D6, Tap The Phuong Mai, Phuong Mai Ward, Dong Da District, Ha Noi City Enterprise code: 0101801870 Phone: 0242112721 Representative: Nguyen Ngoc Long Phuong Mai Ward, Dong Da District, Ha Noi CityFounding date: 24 - 10 - 2005