This author has not been identified. Look up 'Chuan Ma' in GoogleThis author has not been identified. Look up 'Yuqing Li' in GoogleThis author has not been identified. Look up 'Hui Yu' in GoogleThis author has not been identified. Look up 'Xiaoying Gan' in GoogleThis author has not been identified. Look up 'Xinbing Wang' in GoogleThis author has not been identified. Look up 'Yong Ren' in GoogleThis author has not been identified. Look up 'Jun Jim Xu' in Google