How to evaluate Zhang Xu's cursive script?

Liu Xizai in the Qing Dynasty said: "The book spectrum in the imperial court said that You Jun's book was' not vigorous and vigorous', and Du Shaoling called Zhang Changshi's cursive script' bold and grateful'. In fact, it is like water, running water, and there must be two waters." "Learning cursive script is based on the second seal script, and I think I won't. Zhang Changshi got the ancient Zhong Ding inscription, but he didn't see it with a strange angle. What is Hai Ruo to Hebo? " "Han Changli said Zhang" the change of ghosts and gods is impossible ". This language seems strange and vulgar, and the way of ghosts and gods is nothing more than bending faith. According to these remarks, Zhang Xu is called "Zhang Dian" because his behavior is crazy. Wu Jun, Suzhou (now Suzhou, Jiangsu) was born. Zhang Xu's cursive script is full of vigor and precision, with a little painting and self-sufficiency. Zhang Xu's cursive script broke the basic composition of Chinese characters in China for the first time, and endowed the human world with the unique psychological accumulation and feelings of China culture in an unprecedented way and a brand-new calligraphy art form through the line modeling and combination of characters. His spirit of learning from nature, bold innovation, and bold and independent creative methods have opened up a broad space for the prosperity and development of calligraphy art and set a successful example for later calligraphers' learning and creation. Zhang Xu's cursive works mainly include Spring Grass Post, Autumn Deep Post, Jiu De Shuo, Wan Ling Post, Qian Zi Wen, Abdominal Pain Post and so on. Calligraphy regular script copybook