Xi Nghiep Tu Van Cong Trinh Address: 21 Dong Cac, O Cho Dua Ward, Dong Da District, Ha Noi City Enterprise code: 0100100329-003 Phone: 0248512027; 0248512028 O Cho Dua Ward, Dong Da District, Ha Noi CityFounding date: 2 - 6 - 2000