Cong Nghe Opttech LTD Address: 4th Floor, Udic Riverside 1 Building, No 122, Vinh Tuy Street, Vinh Hung Ward, Ha Noi Town, Viet Nam, Ha Noi City Enterprise code: 0111193290 Phone: 0822550885 Representative: Bui Hoang Viet Ha Noi CityFounding date: 26 - 8 - 2025