Chuanbei is the underground bulb of the perennial herb Ocimum sanctum, Gansu maidenhair, curly-leaved maidenhair and sorrel maidenhair, which is bitter, sweet and slightly cold in nature and enters the lung meridian. For dry phlegm cough, it can be combined with Mai Dong and Zi Yuan to enhance the efficacy of moistening and resolving phlegm. For cough with hot phlegm, it can be combined with Zhi Mu. In addition, Chuan Bai Mu is also used for scrofula, phlegm nucleus and canker sores. For scrofula and phlegm nucleus, it can be combined with Xuan Shen and Oyster to soften the hardness and disperse the nodules. For canker sores, it can be combined with dandelion and forsythia to clear heat and detoxify, disperse nodes and eliminate canker sores. In addition, Chuan Bai Mu has the effect of dilating peripheral blood vessels and lowering blood pressure.