Many friends have never used or replaced spare tires personally, nor did they read the introduction of the jack use method and support points in the vehicle manual carefully.
The bottom of the body has a special support point for the jack. The support point for family cars is usually on the inside of the side skirts, like the two fins on the sides of the chassis, about 20 cm behind the front wheel and about 20 cm in front of the rear wheel.
This fin protrudes from the steel plate of the chassis and can withstand relatively large pressure. If the jack is supported on the steel plate of the chassis, it is likely to cause unnecessary damage to the chassis.