KitKats always used to come with metal foil (not plasticised) and a paper covering. I remember making small squares out of that paper and making origami models.
http://www.heatspaceandlight.com/wp-content/uploads/2019/04/...
http://www.heatspaceandlight.com/wp-content/uploads/2019/04/...
Mars bars, Crunchies, and other bars were wrapped in greaseproof paper folded envelope style and sealed with gum. They were the right shape and weight for small paper aeroplanes for annoying teachers. :)
There was a selection of playground origami models traditional for the various other size sweetie and choc wrappers that were mainly greaseproof or waxed paper.
It's especially annoying in Japan, as they also have super strict garbage policies and no possibility to dispose of things in public. That by itself is a great idea, if only they would stop giving me so much unnecessary garbage to carry around.
It would also be quite outrageous to make any generalizations about Chinese weather, considering just how big that particular pile of dirt it.
I remember buying a few items at a department store in Japan and the clerk individually wrapped each item in paper, then wrapped all the items together in paper, then put it all in a paper bag.
They extensively use a 'heavy tissue'-like paper to wrap many items. A decorative plate I bought as a gift for my grandfather was wrapped in about 20 sheets of this paper. Great protection, but it did feel a little wasteful.