Classic works in block letters include Fu of the Great Tang Dynasty, Dong Fangshuo Monument, Many Pagodas, etc. The strokes are cadence and changeable.
The strokes of the middle letters are relatively straight. In ancient inscriptions, middle letters are common, such as Jiuchenggong, Yao Gonggong's epitaph, Educational Legacy, Wu Xingfu, Miao Yan Temple Monument and so on.
Lowercase is easier than the first two. Generally speaking, in the imperial examinations, small letters are widely used when copying classics, including Wang Xizhi's Lao Zi, Fu Qin, Jing Ke, Huang Tingjing and Zhao Mengfu's Tao Te Ching.
Regular script evolved from official script, which is a very common handwritten font style in China's calligraphy. The four regular script are Ou Yangxun, Yan Zhenqing, Liu Gongquan and Zhao Mengfu.
Compared with other calligraphy, regular script is more rigorous in structure and neat in font rules, which is a model in font. Up to now, regular script was very popular in feudal society from the Southern and Northern Dynasties to the Jin and Tang Dynasties.