1. People's Daily official website: People's Daily official website will provide the contents of previous newspapers. You can enter keywords or dates in the search box of the website to find relevant newspapers.
2. Electronic version of People's Daily: The electronic version of People's Daily is the online version of People's Daily, and it also provides the contents of previous newspapers, which can be searched and browsed on the electronic website.
3. Libraries or archives: Some large libraries or archives will collect paper versions or microforms of important newspapers such as People's Daily, and you can go to these institutions to inquire.