What does calligraphy mean by killing paper?

What does calligraphy mean by killing paper? The so-called "writing kills paper" is opposite to "lifting a pen". Breaking the sky with a pen means that the pen tip shows a sense of strength in the air when lifting the pen. Therefore, in contrast, writing and killing paper should refer to the feeling of "killing" the paper when the pen tip pushes the paper, so it is necessary to increase the resistance of the pen tip in the paper operation to make the stippling look vigorous and powerful. In this regard, the Tang people said: "The engraver of gold, looking for a long stone cone, uses a pen to sit thousands of miles."