RESUMEN
Except the complete literature of Maishu: Xiajing, Tianhui medical slips unearthed in Chengdu also include a part of literature document on meridian, which was seriously damaged. Both of them were found in the same box together with Yimashu. The title of the document chapter was not found in the residual medical slips. By investigated the textual content, it was discovered that such medical slips were different from the Mawangdui silk books, i.e. Yinyang Shiyimai Jiujing and Zubi Shiyimai Jiujing, Maishu of Zhangjiashan bamboo slips of Han Dynasty, as well as Maishu: Xiajing in Tianhui medical slips. But, the sentences in description are similar to the sentences of Jingmai in Lingshu (Miraculous Pivot), therefore, this residual slips was named as Jingmai (Meridian) by the collator. In the paper, by the comparison of this residual slip chapter with the unearthed literature document on meridian as well as Jingmai in Lingshu, the origin and evolution of meridian theory of traditional Chinese medicine in the Qin and Han dynasties were explained. By taking it as an example, the construction process of classical theory of traditional Chinese medicine was explored.