Chickens are seen in a farm in Zouping, east China's Shandong Province, April 1, 2013.
China has closed Shanghai's live poultry markets as more birds are being culled to prevent the spread of a new bird flu virus.
The live poultry markets in the Chinese city of Shanghai were shut down after authorities banned the trading of birds to prevent the spread of the H7N9 bird flu, which has claimed the lives of six people in China so far.
State media reported that Chinese authorities on Friday found traces of a new bird flu virus in more areas in Shanghai after the slaughter of more than 20,000 birds at a large poultry market in the city.
"All trading has stopped because of bird flu. The seller has gone home because he has nothing to do," said a seafood vendor.
"People are worried," said Yan Zhicheng, a retired factory manager who like many elderly people in Shanghai makes a daily trip to the market. "Shanghai people eat a lot of duck and chicken. Now we can't touch them."
China has confirmed 16 cases of the infection since the new strain was discovered a week ago.
The H7N9 virus is a form of avian influenza, which had not been seen in humans before.
Chinese authorities maintain that there's no evidence of human-to-human transmission.