Dich Vu Ve Sinh Moi Truong Hai Son LTD Address: No 2, Lane 67, Cau Coc Street, Coc Civil Group, Yen Hoa Ward, Cau Giay District, Ha Noi City Enterprise code: 0111420948 Phone: 0966460786 Representative: Nguyen Duy Khanh Yen Hoa Ward, Cau Giay District, Ha Noi CityFounding date: 19 - 3 - 2026