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Gypsum has been used as medicine for more than 2,000 years. Records of Famous Doctors once recorded that Yang Shicheng in Muzhou (now Jiande) had a daughter who suffered from internal heat and external cold due to bone steaming, and many doctors were invited to treat her. Later, a doctor surnamed Wu in Chuzhou (now Lishui) used plaster, and the patient's temperature returned to normal, which proved that plaster had a good antipyretic effect.
Lotus root is sweet and cold in nature, which can clear away heat and quench thirst, moisten lung and nourish yin. Cut lotus plumule and lotus root into small pieces, boil with half peeled and cut pear, and add rock sugar to eat. It can improve dry mouth and bad breath, help clear the heart, soothe the nerves and sleep.
Celery is cool, slightly cold, sweet and bitter, and relieves the heart fire. Squeeze celery and apple, add boiling water and honey to drink, which can reduce internal heat and blood pressure.
Tomatoes are sweet and sour, slightly cold, and can help digestion, quench thirst and improve fever and polydipsia. Squeeze small tomatoes, half kiwi fruit, proper amount of low-fat yogurt or water until it is granular, which can clear away heat and quench thirst, help reduce heart fire and have the effect of invigorating stomach.
Sugarcane has a sweet taste, which can induce diuresis, clear away heat and quench thirst. Boil mung beans in water for 40 minutes until soft and rotten, then turn off the fire, pour out the soup, and then mix mung beans with sugarcane juice to drink, which can induce diuresis, relieve summer heat and detoxify.
Zhang Xichun, a famous doctor in modern times, became a famous "Zhang Gypsum" because he liked to use large doses of gypsum. He said: "Gypsum is cool and can disperse, and it has the power to penetrate the surface and relieve muscles. Those who have real heat from the outside can use it boldly and win the elixir." Gypsum is mainly composed of hydrated calcium sulfate, which is sweet and cold.