The Chinese medicine name for a white man and a black man standing together is Black and White Chou (analysis: a white man and a black man, when combined, are black and white, so the Chinese medicine name is Black and White Chou).

Heiheichou is morning glory, with 5 to 6 seeds, oval, black or light yellowish white. The flowering period is from June to September, and the fruiting period is from July to October. The seeds are like orange petals, 4 to 8 mm long and 3 to 5 mm wide.

The surface of black and white Chou is gray-black (Black Chou) or yellowish white (Bai Chou). There is a shallow longitudinal groove on the back, and there is a point-like hilum at the proximal end of the ventral connection, which is slightly concave. It is hard and ruptures like cracks when soaked in water. There are two light yellow cotyledons inside, which are closely overlapped and wrinkled.

Extended information

The story of Li Shizhen using morning glory (black and white Chou) to treat diseases:

Morning glory is a laxative medicine with a bitter, cold and strong nature. It has the functions of purging, removing water, removing accumulation, and killing insects. Throughout the history of medicine in the motherland, Li Shizhen, the great pharmacologist of the Ming Dynasty, is the first person who has studied and made good use of morning glory.

A 60-year-old patient came to Li Shizhen and complained that he had been suffering from "colon disease" for decades. He had stools that lasted for several days, and the stool was difficult, even worse than that of a woman giving birth. Taking blood-nourishing and moisturizing medicines will cause chest and epigastrium tightness and discomfort; taking laxatives such as nitrate and yellow tonics, there will be no sensation. This has lasted for more than 30 years, and I have been in deep pain.

When Li Shizhen was diagnosing and treating him, he saw that the patient was obese and spit out a bowlful of phlegm every day. Li Shizhen believed that the patient had qi stagnation in the triple burner, which caused the body fluid to not dissolve and form phlegm, which could not nourish the intestines. The cause is not dryness of the blood, but the use of moisturizing medicine will cause stagnation; the use of saltpetre and the like will remove blood components and will not benefit phlegm obstruction, so they have no effect.

So Li Shizhen took the powdered morning glory seed and made pills with honey locust ointment. Once he took it, his bowel movement was relieved, he could not eat it, and he felt refreshed. Li Shizhen explained this: "Morning Glory Seed can disperse Qi and unblock the three burners. When Qi is smooth, phlegm will be eliminated by drinking, and the up and down will be smooth."

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Baidu Encyclopedia - Morning glory (black and white ugly)