San Jiao is a term found in traditional Chinese medicine (TCM), as part of the modelling of the workings of the human body attempted by early Chinese medical writers. References to it can be found in the oldest Chinese medical texts available, including the Yellow Emperor's Huang Di Nei Jing.The identification of disease according to the Three Burners (三 焦) was first described in the Qing Dynasty by Wu Ju Tong (吳鞠通, 1758–1836) in his book A Systematic Identification of Febrile Diseases.. This system is used within the practice of Chinese herbal medicine, in conjunction with acupuncture and other Chinese medicine (TCM) modalities. Note that the San Jiao theory differs slightly from the San Jiao organ, or channel [(Shou Shao Yang, san jiao jing)]; referred to additionally as "Triple Heater", San Jiao, and "Triple Burner". Viewed by Chinese Medicine as the passage of heat and fluid throughout the body, Elementary Questions (su wen)' explains, "The Triple Burner holds the office of the sluices; it manifests as the waterways."