One year. Self-taught undergraduate thesis is valid for one year. For example, if you participated in the graduation thesis defense in May 2022, your thesis defense score will be valid until June 2023. Before you apply for graduation, you can take several exams to get high marks, but after this time, your thesis defense score will be invalid and you must reply again. The time to apply for graduation every year is between the end of May and June 5438+February, depending on the information on the website of Education Examinations Institute. But if you have applied for graduation, you can't retake the exam. You need to submit an admission ticket to apply for graduation.