Hoang Nguyen Design & Build LTD Address: Nam Trai Hamlet, Xa, Quoc Oai District, Ha Noi City Enterprise code: 0111559202 Phone: 0335930889 Representative: Do Van Vinh Quoc Oai Commune, Quoc Oai District, Ha Noi CityFounding date: 6 - 7 - 2026