According to the academic hall, the introduction is the opening work. Write the introduction at the front, and the books at the back will be hard to read. As the saying goes, everything is difficult at the beginning. In ancient literary theory, it was called "crested pig belly and leopard tail". Although the paper does not emphasize that the beginning of the article is as beautiful, wonderful and fascinating as the phoenix head, the introduction is the first impression to the reader and plays an important role in the whole text, which cannot be taken lightly.

The introduction of the paper should write the following points:

1. Explain the theme, scope and purpose of the paper.

2. Explain the cause, background and brief historical review of related fields of this study.

3. Expected results or significance of this study

4. The introduction is generally not segmented, and the length depends on the content of the paper.