This is great news. I hosted a mutual friend from China for several weeks. At the time, the guest had a family relation in China who was pregnant with her second child. She choice to abort the baby because the associated financial penalties would be too high.
I hope more research is done to quantify the number of unregistered births. I personally find 25 million unregistered out of 30 to 60 million estimated to be a bit high of a ratio.