The advantage of the preface of the paper is that it plays a connecting role and connects the whole text, but the disadvantage is that the ideological content is not obvious enough.

1. Advantages: When writing, you don't have to discuss the research content. The preface should be short and concise, highlighting the theme of the paper.

2. Disadvantages: The main function of the preface is to guide readers to read and understand the full text in depth. When writing specifically, you must not list the documents objectively.