First of all, you'd better ask the teacher to help you see if the paper is off topic. See if the teacher can make some changes with it.

In fact, many foreign students' papers will have this problem. Found it earlier.

A definite paper is topical or a topic has been drawn up in advance, but when you write a paper according to the topic, you unconsciously write something unrelated to the topic, which completely deviates from your topic. However, when reviewing, it is impossible for an off-topic paper to leave a good impression on the reviewer, and you will fail your paper.