A vender sells tomatoes in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, Jan. 29, 2013. China's gross domestic product (GDP) growth unexpectedly slowed to 7.7 percent in the first quarter of 2013, down from 7.9 percent during the final quarter of 2012, data from the National Bureau of Statistics (NBS) showed on April 15, 2013. (Xinhua/Peng Zhaozhi)