Liaocan, also known as Codonopsis, is named after its hometown in Shangdang. Codonopsis pilosula, also known as ginseng in ancient times. Alias: Codonopsis pilosula, Codonopsis pilosula, yellow ginseng, Codonopsis pilosula, Latin name: Codonopsis pilosula (Franch.) Nannf. Plant of the genus Platycodonaceae, Codonopsis genus, the effective part is in the root of the plant. Codonopsis pilosula has the effect of tonifying the middle and replenishing qi, strengthening the spleen and lungs. It is used for weakness of the spleen and lungs, shortness of breath, palpitations, lack of food and loose stools, asthma and cough, internal heat and thirst, etc. "Materia Medica Congxin" records: "Boning the middle Qi, harmonizing the spleen and stomach, and eliminating polydipsia. The middle Qi is weak, so it is very suitable for regulating and nourishing." Produced in southeastern Tibet, western Sichuan, northwest Yunnan, eastern Gansu, and Shaanxi South China, Ningxia, eastern Qinghai, Henan, Shanxi, Hebei, Inner Mongolia and Northeast China. Also found in North Korea, Mongolia and the Soviet Far East.