First of all, because China's education system has always been a lenient standard, that is to say, it is very hard and arduous to study and deal with the contents of the exam. However, once successful, some students' professional arrangements in the previous year or even the first two or three years were relatively loose, which made many students choose to relax themselves after entering the school, and did not really improve their professional level and strength, nor did they really improve their knowledge of their chosen major. Even a few years before graduation, many students lived to get their diplomas. Therefore, these students did not have a good knowledge theory to support them to write a qualified graduation thesis, or did not do relevant practical operations to support them to complete a graduation work, which directly led to many students delaying graduation or even failing to graduate.
Secondly, because there are many professional contents and related books involved in the thesis, the requirements are also stricter, especially for graduate students and doctoral students. Generally speaking, these students need to personally experience the experimental projects of related majors and describe related papers according to the conclusions of enterprise projects. However, the experimental contents of some majors are really difficult and demanding, which is difficult for ordinary students to complete simply. However, some tutors may be more strict with students than ordinary papers for personal reasons, which makes many graduation thesis writing processes which are quite difficult in themselves more difficult. But as long as you carefully collect relevant information and write with your heart, most students can still graduate smoothly.