Paper sampling is divided into two stages: the initial evaluation stage and the re-evaluation stage. The initial evaluation is conducted by three experts. If two of them think the paper is unqualified, they think there is something wrong with it. If the experts think it is unqualified, they will re-evaluate. If the re-evaluation fails, it will also be considered as a problematic paper. If the article only has other minor problems such as unreasonable logic, students are allowed to modify it. However, if plagiarism, tampering, ghostwriting and other academic misconduct are verified. , the degree awarded will be revoked and the degree certificate will be cancelled.