Brief introduction of calligraphy research content

Judging from Zhang Ruitu's works handed down from generation to generation, his artistic development can be divided into three stages, namely, the embryonic stage, the mature stage and the flat stage. Zhang Ruitu's small letters were adopted by Zhong You, and there was no trace of carving. Zhang Ruitu's running script is more casual and natural on the basis of regular script. Cursive script is the most outstanding calligraphy style in Zhang Ruitu's calligraphy, which mostly appears in the form of cursive script. The biggest feature of Zhang Ruitu's cursive script is that it is written with a pen and the kidney bundle is bent.