2, make the car very broken and dirty, car thieves will not steal those cars that are not easy to sell, for example, you can find a car repair shop around the school that can spray paint, let them spray some flowers on the car with the remaining self-painting or something, or get some colored tape and wrap the flowers around the car beam or something.
3. Put it in the dormitory, or discuss with the business staff downstairs and put the car in their room (if it is really not good, give them a tip).