At the undergraduate level, the qualification standard of paper duplicate checking rate is usually formulated by the school or professional educational administration department. Different schools and majors may have different requirements. Generally speaking, most schools or colleges require that the duplicate checking rate of students' papers should not exceed a certain proportion, such as 20%, 30% or 40%.

Specifically, for ordinary undergraduate papers, schools or colleges usually require students' paper duplicate checking rate not to exceed 30% or 40%. This means that if the duplicate checking rate of students' papers exceeds this ratio, then the papers need to be revised or rewritten to ensure that they meet the requirements of the school.

In addition, it should be noted that different schools and different majors may have different control standards for paper duplicate checking rate. Some schools or colleges may be more strict, requiring students to check the duplicate rate below 20% or less. Therefore, students should carefully read the relevant regulations of their school or college to ensure that their papers meet the requirements.

In short, students should understand and abide by the regulations of their school or college on the duplicate checking rate of undergraduate papers. If the duplicate checking rate of the paper is too high and it needs to be revised or rewritten, it will waste time and energy. At the same time, if the duplicate checking rate of papers does not meet the requirements, it may affect students' grades and graduation. Therefore, students should take seriously the writing and duplicate checking of papers to ensure that their papers meet the requirements.