Da Tu Nhien Vnstone Joint Stock Company Address: No 54, Khuong Trung Street, Khuong Trung Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0105451585 Phone: 02485857822 Representative: Mai Van Son Khuong Trung Ward, Thanh Xuan District, Ha Noi CityFounding date: 13 - 8 - 2011