This is called' boiled water'! There are many kinds of ancient beverages in China, and the production methods are mature. Most of them use natural materials, paying special attention to the dual needs of taste and health care. It's just that there was no word "drink" in ancient times. Smart ancestors collectively called their favorite drinks "boiled water". The earliest boiled water was "cardamom boiled water" which was often drunk by Li Qingzhao, a famous poet in the Song Dynasty. Li Qingzhao often suffers from summer dampness and spleen deficiency, so she made "cardamom boiled water" to drink in hot summer. According to the records in Materia Medica, a history book of traditional Chinese medicine, cardamom is pungent and warm, and has the functions of eliminating dampness, promoting qi circulation, warming stomach and resolving hard mass. It is mostly used for dampness blocking qi stagnation, chest tightness, abdominal distension, stomach cold and abdominal pain, dyspepsia and other symptoms. In fact, the boiled water in the Song Dynasty was also very popular in the court. At that time, imperial academy also specially organized chefs and doctors to evaluate and rank boiled water with various tastes and functions, and perilla cooked water ranked first. Because perilla cooked water is fragrant and pleasant, and it has the effect of relieving qi in the chest. In the Ming Dynasty, boiled water was a highly regarded Chinese medicine health drink, which changed from a single formula to a compound one, and its health care function was more obvious. Among them, cardamom boiling water developed into cardamom boiling water composed of cardamom, licorice and Acorus gramineus. Has the effects of eliminating dampness, promoting circulation of qi, warming and nourishing, and stopping vomiting. There are many kinds of boiled water in Qing Dynasty. According to the medical records of the Qing Dynasty, among the prescriptions of Cixi and Guangxu, chamomile 10- 15g, frosted leaves 5- 10g, fresh reed rhizome 5- 10g, dried tangerine peel 10g and fried shell 5-/kloc-are common. Has the effects of improving eyesight, promoting digestion, resolving phlegm and relieving summer heat. Later, boiled water developed into various functional formulas. For example, cassia seed boiled water is used for improving eyesight and relaxing bowels, which is suitable for the elderly. Honeysuckle boiled water is used for clearing away heat and toxic materials and is suitable for drinking in summer.