text:  NPR's Greg Allen reporting. 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 Ruich explains, that adds urgency to a Chinese policy meeting that opened today. The government reported the gross domestic product grew 4.7% in the June quarter over the same three-month period last year. The market had been expecting 5.1%.