How to write well with a carbon pen: fine on the top and thick on the bottom?

Ordinary pens are slightly more difficult, but you can choose professional hard-pen calligraphy pens. There are several types of elbow joints, and beginners can choose type ⅰ and type ⅱ.

No. (elbow) pen, and then use art pen after practice. Of course, any pen can be a real master. I can also write the stroke thickness with a ballpoint pen, so I can practice more.