Dau Tu Phat Trien Ngan Son Joint Stock Company Address: Civil Group 5, Khu 10B, Quang Hanh Ward, Cam Pha City, Quang Ninh Province Enterprise code: 5700495050 Phone: 02033969366 Representative: Ha Van Tien Adress: Civil Group 4, Khu 5, Ha Lam Ward, Ha Long City, Quang Ninh Province Quang Hanh Ward, Cam Pha City, Quang Ninh ProvinceFounding date: 1 - 6 - 2004