My handwriting is ugly. What can I do to correct it?

At that time, it was useless to just paste words. Find a book to see how to write "horizontal, vertical, left, left and folded", and then see how several structural parts are distributed. Not much. I used to use pen calligraphy to show it to teenagers. Why don't you find a copybook for your own reference? Keep at it, and it won't be long before your handwriting will be completely changed.