The Chinese health officials yesterday also confirmed four new cases of bird flu taking the total number of those infected till date to 28, state-run Xinhua reported.
So far 13 cases of H7N9 infections had been confirmed in China's biggest city Shanghai, of which five patients died.
The other cases of infection have been reported from Zhejiang Province, Jiangsu Province and Anhui Province.
The officials have said there has been no case of human-to-human transmission and that the bird flu cases remain isolated, Xinhua added.