Cong Nghe Sach Van An Joint Stock Company Address: No 596, Truong Dinh Street, Tan Mai Ward, Hoang Mai District, Ha Noi City Enterprise code: 0108029967 Phone: 0944236268 Representative: Dang Manh Hung Tan Mai Ward, Hoang Mai District, Ha Noi CityFounding date: 19 - 10 - 2017