1. Contact the library: contact the loan department of Baoan Library in time, explain the situation and request to return the book. The administrator will tell you how to deal with overdue return and ask for the corresponding overdue fee.

2. Settlement of overdue fees: before returning books, settle overdue fees, including fines and liquidated damages. According to the number of overdue days and library regulations, the fee will be different. Ensure that the solution is ready to pay.

3. Consult the librarian: consult the librarian of Baoan Library to learn more about overdue fees and how to avoid future overdue. Libraries and librarians can provide guidance and help solve problems.