"A Study of Fa Shu" is one of the works of calligraphy theorist Sheng Ximing. (Correct)
Basic introduction to "Fa Calligraphy Examination": This work was compiled by Sheng Ximing summarizing his predecessors' and his own experience in learning calligraphy. There are three prefaces by Yu Ji, Ouyang Xuan and Jiesisi at the beginning of the volume of "Fa Shu Kao". The main text includes chapters on calligraphy, etymology, brushwork, garden tactics, situation, wind gods, industrial applications, etc. At the end, there is an appendix of monographs and seals, followed by a postscript.
Basic introduction of Sheng Ximing:
Sheng Ximing was a calligrapher of the Yuan Dynasty, a native of Quxian and a native of Qiuci. During Zhengzheng's reign, he moved to Yuzhang. During the Qing Dynasty, he worked hard and learned a lot. He is skilled in calligraphy and calligraphy, and can also understand the calligraphy of the Six Kingdoms. In the fourth year of Zhizheng period, he tried to examine the eight volumes of the compiled law books and entered them. The emperor read the complete volumes and ordered them to be hidden and banned. He is also good at chanting Buddhist scriptures and studying Sanskrit deeply.