Dau Tu Phat Trien Buu Chinh Vien Thong Joint Stock Company Address: No 34, Lane 163, Nguyen Khang Street, Yen Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0101312220 Phone: 02437821591 Representative: Pham Hong Quan Adress: 24 C Civil Group, Thanh Luong Ward, Hai Ba Trung District, Ha Noi City Yen Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 17 - 12 - 2002