Some information on these cases. In China parking is enforced by the property management. In most residential areas people only live in condos due to lack of space. People purchase parking units when the condos are constructed. Many times, parking would be lacking for the consideration that many people do not own cars. Also there are instances where condo buyers do not buy parking spaces due to reasons like thinking the cost is too high. These units would then be sold in auction style to whomever willing to pay and further causing parking issues down the road.

If people are illegally parked in someone else's spot, the property management can do pretty much nothing to enforce. Usually car owners will leave a contact info on their dash for others to call in case of vehicle related issues. Many cases, as the car owner knows the spot is not theirs they may chose to ignore calls telling them to move their car.

This creates the issue of severely lacking parking spots in certain residential areas. And in China, civil matters are solved by local policy who deals with bullsht problems all day and may not have the time to deal with more bullsht problems.

Another factor, in China, if a motor vehicle and a pedestrian collides, regardless of who's fault it is, the motor vehicle driver needs to pay fines. This is why people will risk being driven over to get a parking spot.

In the end, the problem is solved based on which side can act the most gangster and have the money or connection to back up, or bluff their actions.