If the traffic police catch the vehicle driving with the temporary license plate expired, they should provide the corresponding license plate, sign or go through the corresponding formalities to the traffic management department of the public security organ to retrieve the detained vehicle. Driving after the temporary license plate expires will be detained by the traffic management department of the public security organ, and will be given a warning or fined between 20 yuan and 200 yuan. How to renew a temporary license plate when it expires
 1. When renewing the temporary license plate, you can go to the vehicle management office three days in advance to apply, and bring the following certificates, the owner's ID card, the vehicle invoice and the original certificate of conformity.
 2. The local temporary license plate can be extended for three times, that is, the 21 day service period. During this period, you can only drive in the city and cannot drive out of the area, otherwise you will be treated as a vehicle without a license plate. The procedures for extending the validity period of temporary license plates are the same as those for applying for temporary license plates for the first time. The owner can apply to the public security organ for temporary license plates by presenting his identity certificate, vehicle purchase invoice, new car certificate, compulsory traffic insurance certificate, or import certificate and copies of relevant certificates.