How to check Corolla shock absorbers?

Stop the car after driving 10km on a road with poor road conditions, and touch the shock absorber housing with your hand. If it is not hot enough, it means that there is no resistance inside the shock absorber, and the shock absorber does not work. At this point, appropriate lubricating oil can be added, and then the test can be carried out. If the casing is hot, the shock absorber is short of oil, and enough oil should be added, otherwise the shock absorber will fail. When the car runs slowly and brakes urgently, if the car vibrates violently, it means that there is a problem with the shock absorber.