One of the most entertaining aspects of our time in China was the botched translations that we all looked forward to reading everywhere. There are actually books of "Chinglish" signs that you can purchase there. Mostly they amount to inaccurate translations that could have been much more simply stated. We had so much fun with these that it was actually disappointing to be in Hong Kong where you can find proper British English everywhere. I'm pretty sure the one posted here should just say "Keep Off".
Read more about Chinglish here.
