Van Phong Dai Dien Cong Ty Co Phan Helios Address: Nha A5, Khu Laser, Civil Group 87, O Cho Dua Ward, Dong Da District, Ha Noi City Enterprise code: 0104774304-001 Phone: 02435134157 Representative: Nguyen Duc Son Adress: Hamlet 2, Xuan Duc Hamlet, Yen Thuong Commune, Gia Lam District, Ha Noi City O Cho Dua Ward, Dong Da District, Ha Noi CityFounding date: 28 - 1 - 2011