Dien -Dien Tu -Tin Hoc Eie LTD Address: No 1, Lane 40, Linh Nam Street, Mai Dong Ward, Hoang Mai District, Ha Noi City Enterprise code: 0100775949 Phone: 0246336645 Representative: Do Thanh Dung Adress: No 61, Quang Trung Street, Nguyen Du Ward, Hai Ba Trung District, Ha Noi City Mai Dong Ward, Hoang Mai District, Ha Noi CityFounding date: 17 - 12 - 1998