"Pen breaks and then rises" is a universal law of calligraphy, which is also applicable to cursive script. I'll explain it in detail when I talk about cursive script in the future. Now, if you are interested, you can read Sun's book Fractions first, which is why.
In short:
Beginners of calligraphy, the most common mistakes are:
If you don't use force when writing, you can't penetrate the back of the paper. This is "gone with the wind".
Writing without receiving a pen is continuous. This is "sliding".
"Gone with the wind" and "slippery" are both serious calligraphy diseases.
People nowadays are impatient and want to write as fast as lightning. It is wrong to write that breathing stops and blood pressure rises. The correct way is to take its place first. Pen, pen, explain clearly. Take your time.