If you're surprised by the fact that 20% of the signs featured here are about matters of the toilet, please don't be. I merely present a representative sample of those signs available to be snapped on Beijing's streets.
This one's a bit manic, I suspect it may have been written by someone who'd just stepped, yet again, in a Pekingese's little leavings. See what you can make of it.
The very top line I'm fairly sure has a 错别字, although I'm not 100% as I could be misreading the characters somehow.