The doctoral thesis defense meeting of Jizhou Zhang, a doctoral student of Grade 2019 in Advanced Combustion Laboratory, was held in B405 of Automotive College in May 2023. The title of the thesis is "study on soot formation characteristics of non-premixed combustion of oxygenated fuel". Jizhou Zhang's doctoral thesis work was highly appraised by the experts attending the meeting, and successfully passed the defense. Congratulations to Dr. Jizhou Zhang!