Indeed, Chinese cops laid siege to various universities during the Hong Kong protests, which were strongholds of organization, just like American universities have also been under siege at times for their Palestinian protests. Cops never change, though I will say that American cops seem to be especially trigger-happy. It seems to me that cops in most other countries are able to neutralize threats with non-lethal force most of the time. I never seem to hear about German cops, who I believe also carry guns, shooting a neighbor’s dog or unloading into a guy failing to follow conflicting instructions being shouted at him. I can’t claim to know much about German cops, though.