As far as I know, there are many ways to draw a book cover. Here's how to draw a book envelope:
1. Basic paragraph: upper width and lower width.
2. Horizontal sealing: take the width direction as the main direction of the cover.
3. Vertical sealing: take the height direction as the main direction of the cover.
4. Central symmetry: Central symmetry.
5. Parcel: Parcel cover.
6. Grid layout: arranged on the cover.
7. Splicing: form a unique pattern.
8. Hand-painted patterns: Hand-painted various simple patterns.
9. Sticker decoration: show personality.
10. Calligraphy style: reflecting the art of calligraphy.