Dien Tu Tin Hoc Ha Noi Joint Stock Company Address: No 14, Lane 208, Le Trong Tan Street, Khuong Mai Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0101505399 Phone: 02435656453 Representative: Hoang Minh Duc Adress: No 13, Lane 259, Vong Street, Dong Tam Ward, Hai Ba Trung District, Ha Noi City Khuong Mai Ward, Thanh Xuan District, Ha Noi CityFounding date: 8 - 7 - 2004