Dau Tu Khoang San Truong Son Joint Stock Company Address: No 26, Lang Street, Nga Tu So Ward, Dong Da District, Ha Noi City Enterprise code: 0102321725 Phone: 0242141986 Representative: Le Tran Tuan Adress: No 68 39 Hao Nam Civil Group, O Cho Dua Ward, Dong Da District, Ha Noi City Nga Tu So Ward, Dong Da District, Ha Noi CityFounding date: 20 - 7 - 2007