You can access campus resources from the inside.

The details can be found on the website of your school library, which is generally available.

Some schools only provide it to teachers, so there is no way.

For example, Shandong University provides an off-campus access system for electronic resources. Shanda's website is like this:

When you leave campus, stay at home or go on a business trip, and need to use the electronic resources of the library to access information, come and use the "off-campus access system of electronic resources" of the library! Since the opening of this service in 2004, the library has received great attention and welcome from many teachers. For your convenience, the system has been upgraded at present, and there is no need to register separately. As long as you have the campus card account number and query password, you can easily query important databases at home and abroad outside the school. At present, 34 Chinese and foreign databases can be accessed from outside the school, including Chinese database 16 and western database 18. With this system, you can take the library with you anytime and anywhere, and thousands of electronic periodicals and books are at your fingertips to help your teaching and scientific research.