Tu Van Ha Tang Vien Thong Joint Stock Company Address: No 18, Lane 5, Hoang Sam Street, Nghia Do Ward, Cau Giay District, Ha Noi City Enterprise code: 0106517366 Phone: 02438361413 Representative: Ngo Van Tinh Adress: 12/ A19, Nghia Tan Ward, Cau Giay District, Ha Noi City Nghia Do Ward, Cau Giay District, Ha Noi CityFounding date: 22 - 4 - 2014