O To So 1 Quang Tri Joint Stock Company Address: No 01 Nguyen Trai, Ward 1, Dong Ha City, Quang Tri Province Enterprise code: 3200142328 Phone: 02333852211 Representative: Tran Thi Bich Thao Adress: No 5B Le Lai, Ward 1, Dong Ha City, Quang Tri Province Ward 1, Dong Ha City, Quang Tri ProvinceFounding date: 6 - 12 - 2001