A man visits the "World Heritage in China" photo exhibition in Belgrade, Serbia, Oct. 27, 2014. The "World Heritage in China" photo exhibition was held during the 59th Belgrade Book Fair which was opened on Oct. 26. (Xinhua/Borislav Zdrinja)

A woman visits the "World Heritage in China" photo exhibition in Belgrade, Serbia, Oct. 27, 2014. The "World Heritage in China" photo exhibition was held during the 59th Belgrade Book Fair which was opened on Oct. 26. (Xinhua/Borislav Zdrinja)

People visit the "World Heritage in China" photo exhibition in Belgrade, Serbia, Oct. 27, 2014. The "World Heritage in China" photo exhibition was held during the 59th Belgrade Book Fair which was opened on Oct. 26. (Xinhua/Borislav Zdrinja)

People visit the "World Heritage in China" photo exhibition in Belgrade, Serbia, Oct. 27, 2014. The "World Heritage in China" photo exhibition was held during the 59th Belgrade Book Fair which was opened on Oct. 26. (Xinhua/Borislav Zdrinja)