1. Parking: Stop immediately when it is safe, and park in the emergency parking area or safe area.
2. Check tires: Check whether other tires of the vehicle have problems, such as air leakage and damage.
3. Find the spare tire: Check the trunk and underbody of the vehicle to see if the spare tire has fallen in these positions.
4. Ask for help: If you can't find a spare tire, you can seek local car repair service or call the road rescue number for help.