On June 5th, the defense committee composed of Professor Huang Kaixun from Huazhong University of Science and Technology, Professor Chen Hao from Huazhong Agricultural University, Professor Zheng Fang from Wuhan University, Professor Liu Yi and Professor Wang Chunjiang participated in the defense of doctoral students Xiao Heng, Tang Gang, Feng Shuo and Liu Wenting in Huaxi 210 conference room. The four doctoral students made a detailed report on their research work in the past five years with their full enthusiasm and vivid narration, which was well received by the experts and finally all passed the defense smoothly.