In the era before paper invention, bamboo slip is one of the materials that people used to record scripts. Compared to the silk manuscript on the expensive silk fabric, bamboo slips were used widely. The content covered from official documents, Confucian classics to records of daily life, and it was fully presented from the unearthed evidence. Discussing and investigating the “artistic conception” of the ancient handwriting from the prospective of calligraphy art is perhaps the most accurate, which also happens to be the reality of calligraphy in ancient times. The bamboo slip of “The lawsuit filed by Hou Su Jun against Kou En in Jinwu 3rd year” (hereinafter referred to as “Hou” bamboo slip) was unearthed between 1972 to 1974 in the second excavation at Juyan area. It was a document originally filed at the file room in the ruins of Jiaqu Houguan. In order to distinguish it with the Juyan bamboo slips from Han Dynasty unearthed previously, this excavation was called new bamboo slip. As one of the few and complete slip with clear handwriting in “Juyan new bamboo slip” as well as the content revealing the civil litigation in Han Dynasty, “Hou” bamboo slip received great attention by scholars due to various reasons.

“Ho” bamboo slip was named after the text on the signpost, and it was a record in the early Eastern Han Dynasty. It recorded the process of Jiaqu Hou Li-Chun’s lawsuit with ordinary person Kou-En. The whole slip contains six parts according to the coding sequence, and they are “Yimao Chapter”, “Wuchen Chapter”, “Xinwei Chapter”, “● Right Chapter”, “Xianting Jiaqu Hougoun Chapter”, and “File Dossier” respectively. The scripts used were mainly Qin system script. In the era where Bafen script and cursive script had been fully developed, the simplified, joint, and free running-hand style in “Hou” bamboo slip was regarded as “cursive proximity clerical and semi-cursive scripts”. Along with the presentation of “Bafen clerical script”, they represented the various appearance of daily calligraphy. The paper discuss the origin and the status of free running-hand style from the structure of font before carrying out comprehensive investigation from the stroke of calligraphy, conducting, layout, and space in order to clarify the calligraphy style used in “Hou” bamboo slip.