References are marked according to the specification requirements, and are generally not quoted or marked in the title, author and unit, abstract, keywords and appendix of the paper;
References can be cited and marked in hierarchical titles and texts. Generally, it is directly indexed after the quoted content and marked in the upper right corner. In general, there are no references in the chart. If necessary, the document standard code can be marked in the notes or descriptions of the chart (that is, illustrations or table notes).