From a Chinese IP I was not able to access either http://www.google.cn or images.google.cn at all. However I was able to access http://www.google.com, which redirected to http://www.google.com/intl/zh-CN/ and searching from there, for instance, a search for tiananmen gave all sorts of results showing a less than happy incident there in 1989, including from Wikipedia, CNN, GWU’s National Security Archive, etc.

While there was evidence of differing results between the China IP and http://www.google.com accessed from the U.S., the results did indeed look like the same results as http://www.google.cn accessed from the U.S., but ranked differently.

I sent you a screenshot. Enjoy!