This author has not been identified. Look up 'Benqing Guo' in GoogleThis author has not been identified. Look up 'Jing Gong' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Yao Wang' in GoogleThis author has not been identified. Look up 'Chang Liu' in GoogleThis author has not been identified. Look up 'Lei Li' in GoogleThis author has not been identified. Look up 'Jingwei Wu' in GoogleThis author has not been identified. Look up 'Haifeng Liu' in Google