Chinese diplomats have accused a "western" media agency of disrespectful treatment of a gold medal-winning athlete.
Public anger voiced by diplomats was matched by a vicious response from state-run Chinese media organisations.
The controversy surrounds a photo of Chinese weightlifter Hou Zhihui, who took the first weightlifting gold of the Tokyo Games on Saturday.
China won the first three gold medal events in weightlifting after Hou dominated the 49kg competition first-up.
However, Chinese figures are unhappy about photos used in media organisations around the world showing "shameless" photos of Hou Zhihui when reporting her gold medal win.