Dau Tu Phat Trien Phan Mem Bien Bac Joint Stock Company Address: No 15 B19 Nghia Tan, Nghia Tan Ward, Cau Giay District, Ha Noi City Enterprise code: 0101622399 Phone: 0983585488 Representative: Tran Trong Vinh Adress: 474 Hoang Hoa Tham, Buoi Ward, Tay Ho District, Ha Noi City Nghia Tan Ward, Cau Giay District, Ha Noi CityFounding date: 24 - 3 - 2005