The concept of "Tongtian"（ 通天） has appeared repeatedly in Tianhui medical bamboo slips

involving five organs

five colors and five elements. Through a detailed survey of the relevant provisions of the unearthed documents and the handed down documents

it is proposed that the text "qi reaching to the sky and with organ-viscera"is the guiding principle of Maishu Shangjing（ 《脉书·上经》）

and the contents of "Tongtian"can be summarized as breathing to the sky

five organs to the sky

five colors to the sky

five elements to the sky and meridians to the sky.The concept of"Tongtian"contains the understanding of ancient Chinese medicine on human life

and it is closely related to the "five-color pulse diagnosis"system of Bianque medicine

which is the theoretical basis for constructing Chinese medicine pulse diagnosis and meridians system.