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The *Qianjin Fang* (Prescriptions Worth a Thousand Gold), Volume 13, Heart Chapter, states: "During the three months of summer, diseases of the Heart and Small Intestine are predominant, referred to as 'Chi Mai Jie' (Red Pulse with Sluggishness/Relaxation)." The character "Jie" is rarely seen in classical texts and appears only here in medical literature. Examining the *Book of Rites · Doctrine of the Mean*, it says: "The Way of the gentleman is extensive yet subtle." The commentary notes: "Jie (費) is akin to 'Gui' (strange/unusual); if the Way is not 'Gui', one can serve in office." The *Jingdian Shiwen* (Explanations of Classics) states: "It is also written as 'Fu' (拂). The character 'Fei' has no definition of 'Gui'; the original text must have been 'Fu'. 'Fu' has an variant form written as 'KT', hence it was further abbreviated to 'Fei'. If 'KT' drops the 'Bei' radical to become 'Fu', then there is a relationship between 'Fei' and 'Fei', which is logically consistent. If the original text had been 'Fei', Zheng Xuan would have broken the reading stating 'Fei' should be read as 'Fu'. The *Classic of Poetry · Great Odes · Huang Yi* states: 'The four directions shall have no Fu (rebellion/violation).' The *Great Learning* states: 'This is called violating human nature.' Both commentaries state that 'Fu' is synonymous with 'KT', consistent with the commentary in the *Doctrine of the Mean*, which serves as proof. What the *Qianjin Fang* means by 'Chi Mai Jie' is that pathogenic factors cause the pulse qi to become sluggish and relaxed. Later generations did not understand this meaning. Xu Shuwei of the Song Dynasty, in his *Ninety Cases of Cold Damage*, cited Pang Anchang's *General Treatise on Cold Damage* mentioning 'Chi Mai Zan' (Gathering of Red Pulses). 'Zan' is a miswriting of 'Jie'. Since the term 'Jie' originates from the *Qianjin Fang*, but the character was erroneously written as 'Zan', the meaning becomes unintelligible.

The character "Jie" is not recorded in the *Shuowen Jiezi*. Inferring from the components 'Shi' (Food) and 'Yi', it should be the character "Yi", and "Yi" is interchangeable with "She" (Shoot). In the *Gujin Renbiao* (Table of Persons Ancient and Modern), Cao Yan Gong's name is given as "Yi Gu". Yan Shigu stated: This is "She Gu". The *Classic of Poetry* contains phrases like "Yi Shen Ke She Si" and "She Yan". Therefore, what is meant by "Jie" is to be slack and weary of duties. "She" is also interchangeable with "Ye" (Night). The *Xunzi · Encouraging Learning* states: "In the west there is a tree, named Ye Gan," which is also written as "She Gan". The *Zuo Zhuan · Year 25 of Duke Zhao* mentions "Hu Ye Gu"; the *Jingdian Shiwen* originally wrote it as "She", where "Ye" derives its sound from the abbreviated form of "Yi". The *Shuowen Jiezi* states: "Ye means resting place; it is the place where all under heaven rest." Thus, what is meant by "Jie" is to be slack and take rest. "Ye" is also interchangeable with "Ye" (Liquid). There was a Ding vessel named "Shu Ye" in the Zhou dynasty, referring to Shu Ye, one of the Eight Sages. Furthermore, the *Rites of Zhou · Artificers · Bow Maker* states: "In spring, soak the horn." Zhu Junsheng, a modern scholar, believed that "Ye" implies loosening or dissolving. Thus, what is meant by "Jie" is the reduplication of the character "Jie" (loosening/slack). This corresponds to Wang Bing's (Wang Taipu) explanation regarding "cold not severe, heat not severe, weakness not severe, strength not severe," which therefore cannot be altered. Additionally, examining the term "Shi Yi," it refers to a state where one does not particularly desire food when approaching mealtime. Hence, it is said that thin people, when not having eaten, seem to want to eat, but when approaching the meal, they do not particularly want to eat; thus they are called "those who eat well yet remain thin" ("Shan" is pronounced as in "that good deed"). The meanings of these two conditions are identical.