Aliases: Fritillaria Chuan , Fritillaria dark purple, Fritillaria Gansu, Fritillaria striata. Season: May to August. Storage time: one year. Chuanbei is usually excavated in summer and autumn or when the snow melts to remove fibrous roots, coarse skin and sand, and then dried in the sun or at low temperature. Chuanbei is a commonly used traditional Chinese medicine. Its traditional effect is to moisturize the lungs, relieve cough, and resolve phlegm. Since ancient times, only its underground bulbs have been used.