Reports by OIE claim that strains of H5N6 and H7N9 have broken out in separate areas of the county.
Paris: China reported an outbreak of highly pathogenic H5N6 bird flu at a duck farm in the Guangxi province.
The report was given by the Paris-based World Organisation for Animal Health (OIE) on Wednesday, citing a report from the Chinese agriculture ministry.
The virus killed 23,950 ducks out of a flock of 30,462 ducks, the ministry said. The remaining birds were all slaughtered, it said.
In a separate report, China also reported an outbreak of highly pathogenic H7N9 bird flu in a backyard in the Shaanxi province, the OIE said.
The virus killed 810 layers out of a flock of 1,000 birds, it says.