Hop Tac Xa Cong Nghiep Truong Son Address: 65, Lane 2, Tay Son Street, Quang Trung Ward, Dong Da District, Ha Noi City Enterprise code: 0100363078 Phone: 0248513503 Adress: 42 Hang Duong, Hang Dao Ward, Hoan Kiem District, Ha Noi City Quang Trung Ward, Dong Da District, Ha Noi CityFounding date: 7 - 8 - 1998