Mang Vien Thong So Joint Stock Company Address: No 5, Alley 16, Lane 324, Thuy Khue Street, Buoi Ward, Tay Ho District, Ha Noi City Enterprise code: 0101963222 Phone: 0249364696 Representative: Dao Duc Quan Adress: No 401 K1 Tap The Thanh Cong, Ba Dinh District, Ha Noi City Buoi Ward, Tay Ho District, Ha Noi CityFounding date: 7 - 6 - 2006