Is there a saying about hard pen calligraphy pen?

I see why your question is a hard-pen calligraphy pen: the so-called hard-pen calligraphy pen refers to all hard pens (pens, pencils, chalk, etc.). ) very brush class. At present, there is a craft pen on the market, that is, the nib bends upward, which is just a kind of hard-pen calligraphy pen, but people like to call it "calligraphy pen" every day. What I said is what I have learned. I hope that netizens will correct me.