Underground parking space size problem?

Now the garage design specification for the "garage building design specification" JGJ 100-2015, the net size of the standard underground parking space 5.3 meters X2.4 meters (miniature parking space for 4.8 meters X2.2 meters, but you if you are buying a parking space, the contract must be to see whether it is a miniature parking space or a standard parking space, the two are fundamentally different), if the two sides of the wall, in addition to the net If both sides are walls, in addition to the net size to meet this requirement, the centerline of the parking space from the two sides of the wall net size should not be less than 0.5 meters (see "garage building design specification" JGJ 100-2015 Article 4.1.5), that is to say, if both sides of the wall is a standard parking space, the net dimensions should be 5.3 m X 3.4 m. If less than this size is a miniature parking space, the contract must be read on the contract, this is the essential difference between the two. If it is smaller than this dimension it is a miniature parking space. If it is a demarcated parking space, the measurement should be from the center of the white line to the center of the measurement, the center is not good, you can also measure from side to side.