A cow, which escaped from a truck, attacks a farmer trying to catch it in Liangdun village of Nangang township, Anhui province December 15, 2013. The 700 kilogram (1,543 lb) cow attacked several farmers before being shot dead by policemen, local media reported. (Photo by Reuters/China Daily)

A cow, which escaped from a truck, attacks a farmer trying to catch it in Liangdun village of Nangang township, Anhui province December 15, 2013. (Photo by Reuters/China Daily)

A cow, which escaped from a truck, attacks a farmer trying to catch it in Liangdun village of Nangang township, Anhui province December 15, 2013. (Photo by Reuters/China Daily)

A cow, which escaped from a truck, attacks a farmer trying to catch it in Liangdun village of Nangang township, Anhui province December 15, 2013. (Photo by Reuters/China Daily)

Policemen aim their rifles at a cow, which escaped from a truck, in Liangdun village of Nangang township, Anhui province December 15, 2013. (Photo by Reuters/China Daily)

Farmers pull the carcass of a cow, which escaped from a truck and was killed by policemen, in Liangdun village of Nangang township, Anhui province December 15, 2013. (Photo by Reuters/China Daily)