Du An Cong Nghe Dha Joint Stock Company Address: 3rd Floor, Hong Ha Building, 109 Truong Chinh Lane, Phuong Liet Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0103969822 Phone: 02462924254 Representative: Vu Ngoc Bao Adress: No 7, 31a Civil Group, Ngoc Ha Ward, Ba Dinh District, Ha Noi City Phuong Liet Ward, Thanh Xuan District, Ha Noi CityFounding date: 18 - 6 - 2009