The harvesting period of young leaves and stems is mainly concentrated in March and April, so this time is the best time to eat. It is a must-eat every spring this season, but after this season, the taste will not be so good. <br />Malan head has the effects of clearing heat and dampness, stopping diarrhea, diminishing inflammation, and detoxifying. Medical scientists in the past have recorded the medicinal value of Malan head. "Compendium of Materia Medica" records: "It can disperse blood and reduce swelling, strengthen muscles and smooth the fetus, detoxify and relieve numbness." Modern medical research shows that Malan head has obvious antibacterial effects on Escherichia coli, Shigella and Salmonella typhi; it has a strong inhibitory effect on Staphylococcus aureus, so it is known as a "natural antibiotic".