 China's economy slowed down in the second quarter of this year. That's according to official Chinese statistics released today. The data were weaker than expected, and as NPR's John Brewich reports, that adds urgency to a Chinese policy meeting that opened today in Beijing. The government reported the gross domestic product grew 4.7 percent in the June quarter over the same three-month period last year. The market had been expecting 5.1 percent.