Stephania tetrandra, pinyin: Fěn Fánɡ Jǐ, also known as Stephania tetrandra and Aquilaria sinensis, is the root of Stephania tetrandra. Digging in autumn, removing rough skin, drying, cutting into sections or longitudinal sections, and drying. Born on slopes, hills, grasslands and the edge of shrubs. Location: Zhejiang, Anhui, Hubei and Hunan. Conducive to detumescence, expelling wind and relieving pain. It can also be used for treating edematous beriberi, dysuria, rheumatic joint pain, eczema, sores and hypertension.