Of course, the information in the file cannot be lacking. There are physical examination forms, motor vehicle driving skills admission tickets, driver's license application forms, copies of documents, transcripts of various subjects and so on in the files. Under normal circumstances, the archives are kept by the vehicle management office and the driving school, and there is basically no single data loss. However, before taking subject 4, the driving school may send the files to the students in advance, which requires us to keep them well. Because once the file is lost, the cost and consequences are very serious.