As long as it is a campus network, you can download papers from the database that the library has purchased, and you can choose from the library homepage-literature resources-full-text database. If you don't know which database the journal to download belongs to, Google it, and then go to the full-text database of the library to find the corresponding database. If you are not familiar with these databases, there is a link on the left side of the list to introduce and use them.