Notes are explanations of the details in the paper, which are listed separately in order not to affect the length.

Citation refers to quoting other people's opinions in the paper, respecting intellectual property rights and being irresponsible, so it is marked.

Reference refers to the literature studied in the process of writing this article.

Comments are generally placed in explanatory positions and expressed in brackets. Quotations are numbered in the middle of the paper, and then marked in the footer of the page, which is also a footnote. References are listed at the end of the paper.