A Montbeliarde cow is seen during the 50th International Agriculture Fair of Paris at the Porte de Versailles exhibition center in Paris, France, on Feb. 23, 2013. (Xinhua/Zheng Bin)

A child looks at a cow during the 50th International Agriculture Fair of Paris at the Porte de Versailles exhibition center in Paris, France, on Feb. 23, 2013. (Xinhua/Zheng Bin)

People visit the 50th International Agriculture Fair of Paris at the Porte de Versailles exhibition center in Paris, France, on Feb. 23, 2013. (Xinhua/Zheng Bin)