Cut you in the line like you dont exist. Try to force their way in the queue. Shout to their friends right next to your ears. Bump their luggage in your knee/feet/ankle. Stop in the middle of the road or in front of the elevators. Clip nails in public transport. Burp and fart in restaurant without a word. Drop trash on the floor. Spit in the street… you name it, I’ve seen it all.

And again, like all generalities, it doesn’t make much sense. I know not all Chinese people are like that. Especially your mom lol.