Cong Nghe Vien Thong Joint Stock Company Address: Hamlet 5, Yen Kien Hamlet, Ngoc Hoi Commune, Thanh Tri District, Ha Noi City Enterprise code: 0101388205 Phone: 0246861474 Ngoc Hoi Commune, Thanh Tri District, Ha Noi CityFounding date: 5 - 8 - 2003