It is so impressive that you can pull something totally negative to a positive direction. Do you work for a PR team? Or a propaganda department?

Chinese cities have much much less park spaces compared to the US. This is one reason for this to happen.

Another reason is the Red Guard generation does not care about the concept that you should not annoy other people in a civil society.

Another reason is that religion is severely suppressed by the CCP, so those retired people have nothing to do and no community at home.