It is a parasite that lives on old tea trees. Compendium of Materia Medica records: "It is better to look like grasshopper's feet". A complete crab's foot is like a few thin legs of a crab, curled and stretched, subdivided into several sections, like rushes with flat stems, 3-4 inches long and short and solid sections. It has a strong smell of bacteria, algae and tea, so it is named because it looks like crab feet. The concentrated production area is in Jingmai tea area. According to medical experts' research, "crab feet" is cold, slightly sour, sweet and refreshing after drinking, and has the functions of detoxifying, invigorating stomach, promoting digestion, clearing away gallbladder, lowering blood lipid and lowering blood pressure, and has a remarkable effect on the treatment of lodging urinary redness. Regular drinking can prevent arteriosclerosis, eliminate fatigue and prolong life. Crab claw and Pu 'er tea have good medicinal effects, which can cure stomachache, cool down, prevent cancer and protect health. The price is generally several hundred yuan a catty!