The difference between Sichuan Pai Mu and Zhejiang Pai Mu are origin, flavor, efficacy and so on. 1. Place of origin: the main place of origin of Sichuan Pai Mu is in Sichuan, Yunnan and other places, while the main place of origin of Zhejiang Pai Mu is in Zhejiang and other places. 2. Taste: Sichuan Pai Mu is mainly sweet, sex biased in the moist, so lung heat and dry cough (lungs have heat evil caused by dry cough), deficiency and dry cough (weak body caused by dry cough) with the effect of good. The bitter flavor of Zhejiang Pai Mu is dominant, the nature of the drain, so the wind-heat against the lungs (wind-heat evil invasion of the lungs) or phlegm-heat obstruction of the lungs cough with the effect of good. 3. Efficacy: Both Phellodendron Bark and Phellodendron Bark can clear away heat and resolve phlegm (clearing away heat and resolving phlegm), and disperse lumps and swellings (dispersing lumps and nodules). However, Phellodendron Bark has the effect of moistening the lungs and relieving coughs, while Phellodendron Bark is better than Phellodendron Bark in dispersing lumps. Note: The two should not be used in conjunction with aconite, as they are prone to toxic reactions and should not be used by people with cold spleen and stomach (weak and cold spleen and stomach) or with damp phlegm. The use of Fritillariae chinensis and Fritillariae chinensis should be directed by a physician.