Chi Nhanh Cong Ty Co Phan Cong Nghe Toan Nang Address: No 4, Ly Nam De Street, Hang Ma Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0302787979-001 Phone: 0249332951 Hang Ma Ward, Hoan Kiem District, Ha Noi CityFounding date: 21 - 11 - 2003