Political review does not need to find them, just find their local police station and neighborhood Committee. Political trial is not about finding yourself, but finding people around you, neighbors, neighborhood committees, police stations and other government agencies to know the person being tried and prove that this person has not committed a crime.
You don't need to find yourself, as long as you can find their police station and neighborhood Committee, issue a certificate of innocence and stamp it. Take the document back to Shandong and hand it over to the armed forces department, and political review will do.