Dau Tu Phat Trien Cong Nghe Va Quang Cao Hoang Ha Joint Stock Company Address: No 111 K3, Nguyen Phong Sac Street, Nghia Tan Ward, Cau Giay District, Ha Noi City Enterprise code: 0101281205 Phone: 0248361882 Nghia Tan Ward, Cau Giay District, Ha Noi CityFounding date: 17 - 9 - 2002