Ha Tang Va Dich Vu Vien Thong Viet Joint Stock Company Address: No 3, Alley 1, 16 Dong Quan Lane, Nghia Do Ward, Cau Giay District, Ha Noi City Enterprise code: 0109786085 Phone: 0973478678 Representative: Dang Thi Huong Thao Nghia Do Ward, Cau Giay District, Ha Noi CityFounding date: 21 - 10 - 2021