Dich Vu Khoa Hoc Ky Thuat Trang An Joint Stock Company Address: No 237, Khuat Duy Tien Street, Nhan Chinh Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0101773951 Phone: 0245530715 Representative: Vo Hoang Long Adress: No 237, Khuat Duy Tien Street, Nhan Chinh Ward, Thanh Xuan District, Ha Noi City Nhan Chinh Ward, Thanh Xuan District, Ha Noi CityFounding date: 15 - 9 - 2005