Photo taken on Feb. 22, 2017 shows a closed booth engaging in live poultry trading at a market in Nanchang, capital of east China's Jiangxi Province. The city has closed all live poultry trading and slaughtering venues to prevent H7N9 avian flu infection. China has stepped up prevention of H7N9 avian flu transmission. It has been linked to at least 88 deaths since January. (Xinhua/Peng Zhaozhi)
