The research background at home and abroad can be summarized from China's literature: generally speaking, China literature has the research status or literature review at home and abroad. Read more articles and sort out the contents and background of common, meaningful, academic research and publication in core journals. It is best to choose master's and doctoral dissertations closely related to your research direction, and pay attention to re-describing them in your own language. You can also look for foreign documents from the references of Chinese documents: there are a certain number of foreign documents in the references of Chinese documents. After finding it, you can search and download it on HowNet or other paper websites. When browsing, you can focus on the research background, research methods and research results, which can basically be found in the abstract and introduction. This method needs the help of translation software. You can also find the review literature in the research field: the review literature, the opening report and the literature review in the paper all need to focus on introducing the research status at home and abroad, but the review literature contains more extensive contents, involves a lot of literature, and has rich references, with the author's own views and opinions. It will be very convenient to write if you can find several review documents in the research field, both domestic and foreign. The amount of review materials is small and it is not easy to find. You can search on papers websites such as HowNet. When searching, you need to add the word review or research background after the keyword.