Thuong Mai Va Truyen Thong O&S Joint Stock Company Address: Hong Ngu Civil Group, Thuy Phuong Ward, Bac Tu Liem District, Ha Noi City Enterprise code: 0105210646 Phone: 0343180866 Representative: Nguyen Quang Cuong Adress: No 101, Dang Thai Than Street, Khoi 5, Vinh City, Nghe An Province Thuy Phuong Ward, Bac Tu Liem District, Ha Noi CityFounding date: 23 - 3 - 2011