Thuong Mai Cong Nghe Tan Trung Joint Stock Company Address: Nha 80, Buoi Street, Ngoc Khanh Ward, Ba Dinh District, Ha Noi City Enterprise code: 0101335884 Phone: 0247663055 Ngoc Khanh Ward, Ba Dinh District, Ha Noi CityFounding date: 5 - 3 - 2003