State Key Lab for Turbulence and Complex Systems and Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, 100871, China. binbinlai2012@gmail.com.|State Key Lab for Turbulence and Complex Systems and Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, 100871, China. wang_fumeng@126.com.|State Key Lab for Turbulence and Complex Systems and Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, 100871, China. xiaoqiwang@pku.edu.cn.|Department of Gastroenterology, Peking University Third Hospital, Beijing, 100191, China. duanlp@bjmu.edu.cn.|State Key Lab for Turbulence and Complex Systems and Department of Biomedical Engineering, College of Engineering, Peking University, Beijing, 100871, China. hqzhu@pku.edu.cn.