O To Phuong Khang Joint Stock Company Address: Civil Group 4, Cam Gia Ward, Thai Nguyen City, Thai Nguyen Province Enterprise code: 4600376442 Phone: 02148855456 Representative: Bui Sinh Khang Adress: Civil Group 16, Hoang Van Thu Ward, Thai Nguyen City, Thai Nguyen Province Cam Gia Ward, Thai Nguyen City, Thai Nguyen ProvinceFounding date: 23 - 8 - 2005