He did n't play any matches during the 2014 season due to a serious leg injury .
Zheng permanently transferred to the club in the 2014 season after Qingdao was relegated from the top tier in the previous season .
Zheng did n't play any matches during the 2014 season due to a serious leg injury .
Zheng permanently transferred to the club in the 2014 season after Qingdao was relegated from the top tier in the previous season .