Visitors tour the 11th Qingdao International Auto Show at Qingdao International Convention Center in Qingdao, East China's Shandong province on May 16, 2012. Over 50 new cars will be introduced during the six-day auto show that opened here on Wednesday. (Xinhua/Li Ziheng)

A model presents a car during the 11th Qingdao International Auto Show at Qingdao International Convention Center in Qingdao, East China's Shandong province on May 16, 2012. Over 50 new cars will be introduced during the six-day auto show that opened here on Wednesday. (Xinhua/Li Ziheng)