前言的写作方法包含以下四点内容：陈述领域相关知识，或已有最新研究成果，

The writing method of the preface includes the following four points: state relevant knowledge in the field, or have the latest research results, indicate the scope and theme of the research; conduct a comprehensive literature review, explain who has done relevant research before and now, what is the history and results , What are the problems, what evaluations others have given, etc.; point out the author’s own purpose and goals for the study of this article; explain what methods and innovations have been adopted in the research.

The writing method of the foreword includes the following four points: state the relevant knowledge of the field, or the latest research results, and specify the research scope and theme; A comprehensive literature review is carried out to explain who has done relevant research before and now, what process and results, what problems exist, and what evaluation others give; It points out the purpose and goal of the author's research; Explain the research methods and innovations.<br>

The writing method of the preface includes the following four points: (1) to state the relevant knowledge in the field, or to have the latest research results, and to indicate the research scope and theme; Conduct a comprehensive literature review, and explain who has done relevant research before and now, what has happened and achieved results, what problems exist, and what evaluations others give; It points out the purpose and goal of the author's own research. Explain what methods and innovations are used in the research.