A foreign businessman introduces the products to visitors during the 2011 China (Ningxia) International Investment and Trade Fair in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, Sept. 21, 2011. Over 7,000 guests from home and abroad attend the fair which will last 5 days to Sept. 25, 2011. [Xinhua/Peng Zhaozhi]