Hmmm.
There's no doubt that there are going to be issues in China, It's too big, and the state is too authoritarian not to suspect, but they seem to have a strange attitude - once they get called/warned/suspected on it, they seem to back off in a way that Russia, to put it gently, do not. For that reason I sometimes think these sort of stories are like a 'shot across the bows', warning China to knock it back if it is felt they are ramping up the dodgy - the mind goes back to Ma's army, Sun Yang (who, despite the warnings, f***ed around and found out), Ye Shewin etc.
For the past 12 months, Chinese swimmers have been absolutely pulling up trees in the pool. One entirely hopes its on the up and up, but this does seem, possibly, like a pre-Paris warning, right around trials.
Time, I suppose will tell.