The reason why the library of Xipu Campus of Southwest Jiaotong University needs one card is mainly due to the management and protection of library resources. One-card access is the student identity certificate and library card of Southwest Jiaotong University, and it is also a necessary document to enter the library.

Through the use of one card, the library can verify the identity and authority of readers and ensure that they have the qualification to enter the library. One card can also be used for borrowing books, consulting materials and other operations to facilitate readers' study and research.