Generally speaking, the introduction should not be too long. Too long introduction will not only steal the limelight of the main body of the paper, but also easily lead to readers' anticlimactic expectation and boredom. If it is too short, it is difficult to explain clearly. Generally speaking, for a paper of 6000- 10000 words, the number of words in the introduction is generally 400-500 words, because the introduction of the paper exists as the beginning of the article, so it can play a guiding role for readers. Therefore, when writing the introduction of the paper, we must think more and compare carefully, and strive for the best.

Graduation research requires students to write papers before graduation, so as to concentrate on scientific research and training of students in this major. Graduation thesis is usually arranged in the last academic year (semester). The topic of the thesis is designated by the teacher or proposed by the students. After choosing a topic, students conduct research, write and submit papers. The purpose is to cultivate students' scientific research ability, strengthen the training of solving practical problems by comprehensively applying the knowledge, theory and skills they have learned, and generally examine the academic level achieved by students in universities.