Truyen Thong Echo LTD Address: So 7, 105/41 Doan Ke Thien Alley, Giua Hamlet, Mai Dich Ward, Cau Giay District, Ha Noi City Enterprise code: 0105637607 Phone: 02462518668 Representative: Trang Thi Thuy Van Adress: Chua Nhi Hamlet, Thanh Liet Commune, Thanh Tri District, Ha Noi City Mai Dich Ward, Cau Giay District, Ha Noi CityFounding date: 15 - 11 - 2011