Be Tong Duc San Bac Thang Long Joint Stock Company Address: Ngoc Chi Hamlet, Vinh Ngoc Commune, Dong Anh District, Ha Noi City Enterprise code: 0101791125 Phone: 0248810060; 0249652826 Representative: Tran Van Dien Adress: Ngoc Chi Hamlet, Vinh Ngoc Commune, Dong Anh District, Ha Noi City Vinh Ngoc Commune, Dong Anh District, Ha Noi CityFounding date: 12 - 10 - 2005