Asparagus: sweet, bitter, cold in nature. Contains asparagine, β-sitosterol, steroidal saponins, furfural derivatives, mucilage, etc. It has immune-enhancing, antitussive, expectorant and antibacterial effects. Efficacy: Nourishing yin, clearing away heat, moistening the lungs and relieving cough. It is suitable for symptoms such as insufficient lung yin, dry cough with little phlegm, hemoptysis due to labored cough, yin damage caused by fever, or internal heat due to yin deficiency, thirst, dry tongue, quenching thirst, dry intestines and constipation. Usage: 6 to 15 grams decoction and taken.