Daosheng Tang and Shunan Li successfully defended their doctor degree dissertations on May 27. The Defense Committee includes Prof Xing Zhang, Prof Xingang Liang, Prof Yong Xu, Prof Bingyang Cao at Tsinghua University, Prof Guodong Xia at Beijing University of Technology, Prof Yanhui Feng at University of Science & Technology Beijing, Prof Yuyan Jiang at Institute of Engineering Thermophysics, Chinese Academy of Sciences.