Vien Thong Topphone LTD Address: No 101, Thai Ha Street, Trung Liet Ward, Dong Da District, Ha Noi City Enterprise code: 0109832542 Phone: 0971891888 Representative: Tran Quoc Tuan Trung Liet Ward, Dong Da District, Ha Noi CityFounding date: 25 - 11 - 2021