If you really like hard-pen calligraphy, you can also buy an artistic pen in the store (which is not available in most stores). Calligraphy art pens are available online. But it takes a long time to adapt to the use of calligraphy brush. Learn to twist or turn the pen, you can write fuller words, with the taste of a brush.
The principle of pen selection: first, the pen tip is soft and hard, that is, the pen tip can be separated with a little force, but it will not be separated too much, and it will be faster to return to its original state; Second, the astringency is appropriate. When the ink is not touched, the paper has a certain astringency, but never "scratch" the paper; Third, the pen tip opening is centered; The fourth is to write in a little red ink (provided by the store), and the water must be dripped; Fifth, it feels good and the weight is appropriate.