An exhibitor shows a "green" egg at the 11th (2013) China Animal Husbandry Expo in Wuhan, capital of Central China's Hubei Province, May 18, 2013. The expo, which kicks off on May 18, will last until May 21. (Xinhua/Hu Weiming)

Visitors taste toasted beef at the 11th (2013) China Animal Husbandry Expo in Wuhan, capital of Central China's Hubei Province, May 18, 2013. The expo, which kicks off on May 18, will last until May 21. (Xinhua/Hu Weiming)

Visitors taste toasted beef at the 11th (2013) China Animal Husbandry Expo in Wuhan, capital of Central China's Hubei Province, May 18, 2013. The expo, which kicks off on May 18, will last until May 21. (Xinhua/Hu Weiming)

People visit the 11th (2013) China Animal Husbandry Expo in Wuhan, capital of Central China's Hubei Province, May 18, 2013. The expo, which kicks off on May 18, will last until May 21. (Xinhua/Hu Weiming)

Four people wearing advertisement costumes of a disease control company are seen at the 11th (2013) China Animal Husbandry Expo in Wuhan, capital of Central China's Hubei Province, May 18, 2013. The expo, which kicks off on May 18, will last until May 21. (Xinhua/Hu Weiming)