How to write the background of the topic selection, start with the content of the research background: 1. Introduction to the topic selection: the relevant situation of the current research on the selected topic is such as the results of previous research, and the current research on the selected topic To meet the situation, first discuss the industry environment, and then cite industry data reports as support. 2. Personal views: Your special views on the topic and the reasons for choosing this topic should reflect your thinking and highlights on this topic.