Sach Va Thiet Bi Giao Duc Trang An Joint Stock Company Address: No 41/418 De La Thanh, O Cho Dua Ward, Dong Da District, Ha Noi City Enterprise code: 0102147139 Phone: 02435131950 Representative: Mai Hoa Adress: No 2, T Lane, Civil Group 81, Kim Lien Ward, Dong Da District, Ha Noi City O Cho Dua Ward, Dong Da District, Ha Noi CityFounding date: 25 - 1 - 2007