What does it mean that the banner or vertical width of hard pen calligraphy is not less than 34?

That is to say, the banner or vertical width of hard pen calligraphy cannot be less than 34, which is its size. Generally, the size of calligraphy banner paper is between 30-60 cm in vertical height and 100-200 cm in horizontal width. If it is a banner with fewer numbers, when the scale is 30-40 cm in vertical height and 100- 130 cm in horizontal length, it is ideal to arrange four characters with appropriate density and uniform width. Hard pen calligraphy should not be less than 34 banners or vertical banners, and the requirements are more stringent.