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Without a club, An Qi would move to reigning league champions Changchun Yatai where he played understudy to Zong Lei, however before he could challenge for the goalkeeper position he suffered a knee ligament break where he would decide to go to Belgium to receive surgery and causing him to miss the entire 2008 league season.
By the beginning of the 2006 league season newly promoted Changchun Yatai were interested in him and he was allowed to leave after a 2 million yuan transfer.
The 2007 league season was to prove the most successful for Du Zhenyu as he played a significant part in the title-winning Changchun Yatai team, subsequently winning the Footballer of the Year award in the process.