The reasons for the high duplicate checking rate are: (1) the design of the work is too simple, the function is single, the hardware structure is simple, and there is not much substantive content in writing the paper. In order to meet the requirements of the number of words, only a large number of network words and references are extracted and detected by the graduation thesis duplicate checking system, so the repetition rate is high.

(2) The overall idea and specific design of the works produced by students come from others, rather than "self-creation", and the paper writing also refers to other people's design documents, which is too "dependent" and seriously plagiarized, and it is impossible to avoid the duplicate checking system of graduation papers, resulting in a high repetition rate of papers.

(3) Students can complete high-level works and achieve good functions and indicators. However, due to the lack of writing ability, it is impossible to properly describe the design process and the characteristics of the work by combining words, pictures and tables, but simply fill the paper with chip materials and general introduction content, which is plagiarism and leads to high repetition rate.

(4) Some works are displayed in the form of web pages, software or APP, with less hardware design (or no hardware) and more software programs. Students put the program in the text of the thesis, and the graduation thesis can be repeated, resulting in a high repetition rate.

(5) Few students' works and papers are written by a third party, and the quality of completion is high. Once the paper is submitted to the graduation thesis duplicate checking system, the repetition rate is often very high, and the repetition rate of graduation thesis duplicate checking is at least over 60%, even as high as over 90%.