This trial is designed to evaluate the use of the patient’s own bone marrow cells for the treatment of Spinal Cord Injury. The trial is being conducted by Guangzhou General Hospital of Guangzhou Military Command in Guangdong and expects to enrol 20 subjects. Participants will receive mesenchymal stem cells from their own bone marrow injected directly into the fluid surrounding their spinal cord (intrathecal injection) and into their veins (intravenous injection). Participants will be monitored for complications, as well as changes in their clinical condition.