O To Kinh Bac Joint Stock Company Address: Phong A1311, DN 1 Nha A, Khu Nha O Sy Quan, Nhan My, Nam Tu Liem District, Ha Noi City Enterprise code: 0104262137 Phone: 02422285535 Representative: Ha Thi Lam Nam Tu Liem District, Ha Noi CityFounding date: 24 - 11 - 2009