The email file of Harbin Vehicle Management Office is true. According to the information from official website of Harbin Traffic Management Bureau, when handling the driver's license, the vehicle management office will establish and manage the driver's file. If the driver needs to mail the driver's license file, the vehicle management office will follow the prescribed procedures and mail the file to the driver himself through a professional courier company or postal agency, so the file mailed by Harbin Vehicle Management Office is true.