Maybe they don't pick up their litter? I haven't noticed but it's the only thing that seems like it might be true. But the thing is that all tourists are really bad about litter. If there isn't a bin every 10meters they don't know where to put it and they don't keep it with them until they find one because they don't know for sure that they will due to not knowing the place. It's a bad tourist habit overall.
I've literally never seen a bad chinese tourist.
Maybe they don't pick up their litter? I haven't noticed but it's the only thing that seems like it might be true. But the thing is that all tourists are really bad about litter. If there isn't a bin every 10meters they don't know where to put it and they don't keep it with them until they find one because they don't know for sure that they will due to not knowing the place. It's a bad tourist habit overall.
the solution to that is to have lots of bins. some cities i've been to seem to be anti-bin and dole them out like they're made of pure gold.