The format of vertical Chinese characters: the first column (counted from right to left, not marked at the bottom) is blank for 2 boxes or the title is written in the middle, the second column begins to write the text (blank for 2 boxes), and the last column is signed or sealed.
Advantages of vertical characters: Ancient calligraphers with writing brushes left the paper, so they wrote smoothly. Modern pens and ink paintings, if they are vertical, are easy to be erased by hand, so they are not easy to write. Simplified characters rarely have vertical characters, and almost all of them are written in traditional Chinese characters.