The rhizome of winged Chinese yam, also known as Shenshu, beginning of winter potato, Damailing potato and potato seed, is the tuber of Chinese yam. Pseudo yam is sweet, flat and non-toxic. Its form is: ginseng potato, perennial twining herb. Tubers are fleshy, up to 60 cm long, with different shapes and colors. Stems sharply quadrangular or with 4 narrow wings, smooth and glabrous. Leaves opposite; Reiyoshi is often found in leaf axils; Leaf blade is heart-shaped elliptic to heart-shaped, lobes are nearly round, and the length is 8 ~ 16 cm. 5 ~ 8 cm wide, acute at the apex, heart-shaped at the base, with 7 ~ 9 veins. Cultivated or wild. Distributed in Fujian, Guangdong, Guangxi and other places. Indications for diarrhea due to spleen deficiency; Kidney deficiency nocturnal emission; Take it down; Frequency of urination; Cough due to fatigue; Quench thirst; Ulcers and ulcers; Soup fire injury. Has the functions of invigorating spleen and stopping diarrhea; Benefiting lung and nourishing kidney; The efficacy of detoxifying and healing sores.