A vender works at a poultry market in Haikou, capital of south China's Hainan Province, April 26, 2013. Since the outbreak of the H7N9 avian flue virus, the poultry market in Hainan has been seriously affected, with the poultry price slumping by 40-60 percent on average. The local government has taken measures to step up monitoring efforts so as to ensure the healthy development of poultry industry. [Photo/Xinhua]