He is another opportunistic Shanghainese prick. His coach is an asshole.
He knew he could not win the gold medal in the last olympics, which means he will lose all his advertisements and endorsements, so he faked injury and dropped out. His coach was faking it too and cried like a baby in the press conference.
Now he wants to come back and have another round of advertisements and endorsements again.
I spoke to a PRC during the closing ceremony of the last olympics and he said that Liu Xiang will never have a comback because to the PRCs, doing the right thing at the right time/occasion is very important. He failed to do that so he will not be given another chance again.
I have a different view as he is still the fastest 110m hurdler in China so the spotlight will still be on him and he and his CCB coach will make use of the media to make $$$ for themselves again.