When the status in the library catalog shows "On cataloging", it means that the book is still being processed. At this time, you can proceed to the  "Find Documents and Interlibrary Loan" to make a reservation request. The library will reserve the book for the applicant, and after the book processing is complete, a "Book Arrival Notice" will be sent. Upon receiving the notification email, the applicant can come to the library to borrow the book.