At PVG last time my checked baggage was overweight, so the agent made me carry-on the heavy items. Then when going to security they asked me to weigh my second bag and if it was a computer, which it was.

Just speak english to them and they won't understand probably and let you on if you run into trouble.

OR try yelling at them why they let other passengers bring so much luggage.

Either way shouldn't be an issue, but I'd stick w/ english and act confused.