Aha, calligraphy?
There is an idiom about twists and turns. Do you know what the original intention is? It means writing a stroke, such as the second stroke of the herringbone character. When writing, you should first press the pen upwards, then lift the pen diagonally downwards and press the pen, then write to the right, stretch and close the pen. As shown in the picture:
No, you have to make three turns before you can write one stroke. Of course, this doesn’t have to be the case when writing running script or cursive script.
Take a wave on the river and sea as an example. Only when it is low - high - low can it form a wave. Right?