O To Thanh Cong Quang Ninh Joint Stock Company Address: Civil Group 3, Khu 10B, Cam Pha City, Quang Ninh Province Enterprise code: 5701509933 Phone: 02033969689 Representative: Do Duy Thang Adress: Ngoai Hamlet, Dong Anh District, Ha Noi City Cam Pha City, Quang Ninh ProvinceFounding date: 16 - 8 - 2011