Tomatron said:
I have to say, it sounds like the authorities and IAAPA had this planned for when the Chinese companies arrived. No one just rustles up a sign saying "Stall closed due to intellectual property theft". And good on them for doing it!
Or the companies are just crazy prepared, always bringing one when going to fairs abroad, in case the inevitable happens.
Alternately, the sign was presented to them as a gift to go along with all the lawsuit papers. You know, like they do with kids' magazines.