Participate in the annual evaluation and defense. During the study period, every doctoral student will participate in the annual evaluation and defense, and the independent review team will assess his phased achievements. Only those who pass the assessment can register for the next academic year and graduate after passing the final doctoral thesis defense. Xi Jiaotong University, located in Suzhou City, Jiangsu Province, is a Chinese-foreign cooperatively-run university with independent legal personality, which was approved by the People's Government of China and the Ministry of Education.