To write a good introduction, you need to do the following:

1. attract readers' attention: the introduction is the beginning of the article, which should arouse readers' interest and make them want to continue reading. You can attract readers' attention with fascinating stories, interesting facts or famous sayings.

2. Summarize the theme and purpose: The introduction should briefly summarize the theme and purpose of the article, so that readers can have a general understanding of the content of the article at the beginning of reading. This can help readers better understand the meaning and value of the article.

3. Provide background information: The introduction can provide readers with some background information to help them better understand the content of the article. These background information can include related historical events, research status, social issues and so on. Let readers have a preliminary understanding of the background of the article.

4. Lead out arguments or opinions: The introduction should clearly express the author's arguments or opinions, so that readers can know the author's positions and opinions. This can help readers better understand the central idea of the article, and look forward to the subsequent argumentation and analysis.

5. Preview the follow-up content: The introduction can preview the arrangement and structure of the follow-up content appropriately, so that readers can have a preliminary understanding of the overall framework of the article. This can increase readers' interest in reading and help readers better understand and grasp the key points of the article.

In short, writing a good introduction needs to attract readers' attention, summarize the theme and purpose, provide background information, draw out arguments or opinions, and predict the follow-up content. Through these efforts, we can make the introduction more attractive and convincing, and lay a good foundation for the whole article.