This author has not been identified. Look up 'Yaoli Wang' in GoogleThis author has not been identified. Look up 'Yujun Duan' in GoogleThis author has not been identified. Look up 'Wenxia Di' in GoogleThis author has not been identified. Look up 'Qing Chang' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Lipo Wang' in Google