"To mess with him even moar. Not only a kick in the ass, but a slap in the face too. "Well, you've been banned for life, oh, and we want you to pee in this cup""
Dude, it's the Olympics, they already do that.
As I understand it, EVERY medal winner does a whiz test for a number of banned drugs.
As for arresting him, this is China we're talking about, and he's a member of the consortium of Fraternal Communist Nations. Probably not going to happen.