Tu Van Thiet Ke Xay Dung Oatec Vni LTD Address: No 12N4, 90 Nguyen Tuan Lane, Phuong, Thanh Xuan District, Ha Noi City Enterprise code: 0111184176 Phone: 0989839797 Representative: Le Trong Hai Ha Noi CityFounding date: 19 - 8 - 2025