1. Re-cutting paper: Re-cutting paper according to the required size with a ruler or paper cutter. Use a ruler as a guide to ensure that the cutting edge is straight.
2. Find a professional printing shop or binding shop: If you have no confidence in cutting paper, you can take the cut paper to a professional printing shop or binding shop and ask them to help you cut paper again.
3. Reprint: If the cutting error is very serious and affects the beauty of the whole paper, it is necessary to reprint the whole paper and cut it correctly.