Galangal, also known as galangal, wind ginger, etc., is derived from the dried rhizome of galangal, a plant of the Zingiberaceae family. Galangal is native to Guangdong, Guangxi, Taiwan and other regions. Galangal, a native medicinal material in Lingnan, not only has high clinical medicinal value, but also has many daily uses such as making tea, decocting soup, cooking porridge, and brewing wine.

Tangerine stem is a kind of Chinese medicinal material that is more common in Chinese medicine, and it is also a kind of Chinese medicinal material that has certain benefits for health.

Banlangen has no obvious effect on the prevention and treatment of influenza. Banlangen is only effective for wind-heat type colds, and the symptoms do not match. Even if it is taken, it will not have the effect of preventing or treating influenza.