based on my personal experience

There is a guy in my group who was from that place, he didn't say one good word for China.
It's strange that he always got the bad aspects news on China timely and spread in office, like fake products, fake in Olympic Ceremany, etc. We know that and we hate that either.
What I don't understand is that he didn't say even one good word for the good part of China, like the grandness of the Olympic Ceremony.
Gradually I couldn't bear that and countered back, letting him and my collegues know that there is good and bad in every country. China is already made great progress in the recent decades, and it's understandable that she still have many places needing improvement.

He behaved himself ever since, at least he didn't do like that in front of me. We welcome criticism in good intention, but oppose those with evil purpose.