Dau Tu Ky Thuat Thien Tan Joint Stock Company Address: No 22, Le Thanh Nghi Street, Bach Khoa Ward, Hai Ba Trung District, Ha Noi City Enterprise code: 0101303561 Phone: 0248694420 Bach Khoa Ward, Hai Ba Trung District, Ha Noi CityFounding date: 18 - 11 - 2002