A man checks bike tires in the exhibition hall in Shanghai, east China, May 6, 2013. The 23rd China International Bicycle & Motor Fair opened here on Monday, attracting over 1,300 companies with their lateast products for display. (Xinhua/Zhu Lan)

A visitor tries a bike in the exhibition hall in Shanghai, east China, May 6, 2013. The 23rd China International Bicycle & Motor Fair opened here on Monday, attracting over 1,300 companies with their lateast products for display. (Xinhua/Zhu Lan)

A visitor looks at new bikes at the exhibition hall in Shanghai, east China, May 6, 2013. The 23rd China International Bicycle & Motor Fair opened here on Monday, attracting over 1,300 companies with their lateast products for display. (Xinhua/Zhu Lan)