Sao Thang Long Investment Joint Stock Company, formerly Nam Dinh Educational Book and Equipment Joint Stock Company, is a Vietnam-based company engaged in the wholesale and retail trading and distribution of textbooks, reference books and other books through its network of a book supermarket and book stores. It also cooperates with other publishers to publish magazines, newspapers, maps, compact discs and other educational materials. The Company is involved in the manufacturing and wholesale and retail trading of office stationeries and educational equipment. In addition, it offers printing services of newspapers, magazines, maps and other publications.