Wang Chen, right, vice-president of the Chinese Academy of Engineering and director of the Center for Respiratory Diseases of the China-Japan Friendship Hospital, and Zhan Qingyuan, director of the respiration and critical illness department at China-Japan Friendship Hospital visit Hu Weifeng at an ICU ward at Tongji Hospital in Wuhan, Central China's Hubei province, on March 25, 2020. [Photo by Zhu Xingxin/chinadaily.com.cn]