It's best to borrow a small electric drill, (hand drill can also be used, generally using a 2mm drill) to aim at the mark drill, and then tie it firmly with thread. It's best to smear the binding line (back of the book) with glue. (You can't use perfume, it will grow worms after a long time. ) Finally, paste the cut cover paper. If you want hardcover, first print the designed title on the cover, so that HKCEE's binding materials are hardcover.