When choosing Yunnan comfrey, it is best to choose some thick and sturdy ones with thicker skin, purple color, and hard texture with a smaller wooden heart.

Radix linderae is a commonly used medicine to help people with headache, postpartum abdominal pain and frequent urination in clinical practice.

Rehmannia glutinosa is cold in nature and sweet in taste, and has the functions of clearing heat and cooling blood, nourishing yin and promoting body fluid. It can be used to treat various febrile diseases, such as fever due to poisoning, blood-heat hemorrhage, yin injury due to fever, fever due to yin deficiency, and constipation due to fluid injury.

Alisma is one of the traditional Chinese medicine. According to Chinese medicine theory, it is cold in nature and has the effect of diverting water and dampness. Modern medical research shows that Alisma can reduce serum total cholesterol and triacylglycerol content, slow down the formation of atherosclerosis.

Polygala is produced in Northeast, North, Northwest and Central China and Sichuan. It is a perennial herb with a stout taproot and a succulent phloem. Yuanzhi has the functions of calming the nerves, removing phlegm, and reducing swelling. It is used for insomnia, forgetfulness, palpitation, trance, unpleasant expectoration, sore, swollen poison, breast swelling and pain caused by heart and kidney failure.

Knotweed, also known as bitter stick, spotted stick and other names, is the dry rhizome and root of Polygonaceae perennial herb Polygonum cuspidatum, which is excavated in spring and autumn. It is not only an ornamental plant, but its tender stems can also be eaten as vegetables. Its roots can be used as cold drinks, and its rhizomes can often be used to make Chinese herbal medicine noodles.

Chinese herbal tea can be said to be a shining pearl in the treasure house of Chinese medicine.