Andrew and I were walking down a street in Shenzhen, China when a police officer turned on his lights in front of us. The reason he stopped- he saw one woman with two children with her (only one child allowed in China ((unless you are a minority)). You can see the officer questioning one of the kids. Andrew and I walked by the woman a little later and she only had one kid with her.
We can't know for sure what really went down, but it was interesting to see.