Yi Yin

Yi Yin, whose given name was Zhi, lived at the transition between the Xia and Shang dynasties. Legend holds he served as a chef in the retinue of a noblewoman from the Youxin clan who married into the Shang royal house. Carrying a tripod cauldron and chopping block, he expounded the principles of flavour harmony to King Tang of Shang and was appointed Right Chancellor. He assisted King Tang in overthrowing the Xia dynasty and establishing the Shang; served four successive monarchs—Tang, Wai Bing, Zhong Ren, and Tai Jia—and famously exiled the wayward Tai Jia to Tong Palace while governing in his stead, only restoring him to the throne after genuine repentance. Having completed his great service, he retired in dignity and was honoured as the Primordial Sage. Profoundly versed in the doctrine of 'harmonising the Five Flavours', he used culinary practice as a metaphor for statecraft, earning veneration from the food-service industry as its founding Sage of the Kitchen. Tradition further credits him with inventing the method of preparing herbal decoctions—the earliest form of Chinese medicinal soups—thus inaugurating the tradition of herbal 汤剂 (tangji, decocted prescriptions) in traditional Chinese medicine. Chefs invariably pay homage to Yi Yin upon opening a new kitchen, praying for brilliance in their knives and ladles and prosperity in their enterprises.