Talking about blood of tutles and that stuff, since the beginning of the OGs there are already two announced positive doping samples - one weightlifter and one gymnast. It was proclaimed that on these Olympics the doping control will be more tightened than ever.
Don't rely much on Doping control. It's like viruses and anti-virus companies. The first is always ahead of the others. And WADA chooses who to catch and who not. When they catch athletes like Usain Bolt, then I'll start believing they are really fighting against doping. I'll bet my head that the cycling gold medalist Vinokourov is doped to the max. He was caught once and he is also a very shadow and scandalous figure...
About Shiwen Ye - you said it yourself. How can a 16 year old girl outswim Ryan Lochte??? Scientific metods? Maybe nuclear science