If it is developed in the official WeChat account, it can be put on the platform. If it is not developed, it can also be stored in the cloud and linked to the original text for reading. You can also develop a page dedicated to storing pdf files and their descriptions. Otherwise, you can provide technical assistance.

You can log on to WeChat official account platform, where there is data management. There is a file to upload. You can upload the above, and then add the content of this article to the customization. Fans can download it when they open it. You can upload your file to the website, copy the link and add it here.