Please have more babies. That’s China’s message for couples after decades of limiting most families to just one child. Why the turnabout? China is aging. China’s working-age population has been shrinking, and projections show that one quarter of the population will be 60 or older by 2030. This threatens an economic boom that’s been built on a vast labor supply, and there may not be enough able-bodied people to take care of all those seniors. Policy makers are increasingly concerned that drastic