Chi Nhanh Cong Ty Co Phan Long Trung Sach Address: 63, Song Lu Street, Phuong Mai Ward, Dong Da District, Ha Noi City Enterprise code: 0900191702-001 Phone: 0913508127 Phuong Mai Ward, Dong Da District, Ha Noi CityFounding date: 9 - 4 - 2002