For example, compare Yan Zhenqing's Ma Gu Xian Tan Ji with Huang Ziyuan's regular script.
Many beginners will think that Yan Zhenqing's handwriting is not good, but they will know when they arrive. His layout is indifferent, unpretentious and natural.
Huang Ziyuan's regular script is solid, but stingy. The font size is similar, and each stroke is similar. This is called rigidity, no change, no gas field, full of craftsman spirit.
So this is where Yan Zhenqing is superior to Huang Ziyuan.
There are many similar examples. Except for Wang Chong, many lower case letters in Ming and Qing Dynasties were reserved, which was much worse than that in Wei and Jin Dynasties.
Monk Wang Qian said, "Books are scattered, but if you want to study, you must spread your arms first." . In other words, write modestly, not rigidly.
This is the realm.