Du An "cung Co Giao Duc Moi Truong Trong Truong Pho Thong Viet Nam" Address: 52 Lieu Giai, Ba Dinh District, Ha Noi City Enterprise code: 0101639674 Phone: 0248327801; 0248327878 Ba Dinh District, Ha Noi CityFounding date: 21 - 4 - 2005