Write in water tone, hard pen calligraphy, horizontal or vertical writing, what is the format requirement, and the paper is 150 characters.

It is recommended to write horizontally. Writing an ancient poem with water tones will appear too few vertical lines and the layout will not look good. If it's regular script, official script or seal script, it's best to write one line at a time, but it's a character, so it's best to write it in running script or cursive script. Don't be too picky. "No horizontal lines, no vertical columns" is ok, that is to say, it is not necessary to arrange every word neatly, but it is best to write with your heart. I believe you.