Cong Nghe Otb Viet Nam Joint Stock Company Address: No 26 Gia Ngu, Hang Bac Ward, Hoan Kiem District, Ha Noi City Enterprise code: 0108104621 Phone: 0987873388 Representative: Nguyen Duc Dai Hang Bac Ward, Hoan Kiem District, Ha Noi CityFounding date: 21 - 12 - 2017