Do you think LiuXiang cheat or not?

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LiuXiang give up in olympic games yesterday.You know liuXiang is the first man who break the record of run 110 in china,and he get the first gold medal in chinese olympic games,so he is a dream of yellow people,and 130million depond on he and trust he very much,But yesterday,He let us down.He didn't want to try it,Most of people cry about this,We can't get any news what he can't attend the game before,so it very shake up all over the china. I know he have too much pressure on his shoulder.I will understand if he can't get the gold medal,but I can't accept the fact like this.Most of people think he haven't enough confident to himself,so he give up and cheat us about his foot.I think only he know the truth.What do you think about?Please let me know.