1. The evaluation stages are different: the initial evaluation is the first stage of the mathematical modeling competition, and the final evaluation is the last stage of the mathematical modeling competition.

2. The evaluation content is different: the preliminary review is mainly about the formal review of the papers submitted by the participating teams, including whether the materials of the papers are complete, the structure of the papers, the number of words, the duplicate checking rate, the format and style, and whether the references meet the requirements of this journal; The final review is mainly a substantive review of the papers passed in the first instance, including the academic, creative and practical nature of the papers.