On the one hand, some people think that Nike officials didn't know Liu Xiang's retirement decision in advance. On the other hand, however, public information shows that on April 7, 20 15, Liu Xiang announced his retirement on his personal Weibo. A minute later, Nike paid tribute to the ordinary person who changed the world on its official Weibo, which seemed to show that Nike knew something about Liu Xiang's retirement.
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