Vien Thong Sao Nam Joint Stock Company Address: 11th Floor, No 169 Nguyen Ngoc Vu, Trung Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0102045419 Phone: 02462566666 Representative: Dang Van Anh Adress: No 31 Hang Bo, Hang Bo Ward, Hoan Kiem District, Ha Noi City Trung Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 11 - 10 - 2006