The banyan tree Wu Hao, also known as Wu Hao, Wu Hao, Yi, Wu Yu, has been planted since the Han and Jin Dynasties. "The ancestors" of the pharmaceutical industry, the Dan medics, the Taoist ancestor of the Taoist priest Ge Xuan in the year 202 to the eucalyptus scorpion mountain medicine practice medicine, the development of the herb garden, planting carp, sand ginseng, black medicinal herbs, Wu Hao, etc. More than 100 kinds of medicines. Because the eucalyptus was "Wu" at that time, it was named "Wu Yu" by its territories.

The appearance of medicinal materials of eucalyptus scutellariae is elliptical, oval, 1.0-2.5cm long and 0.6-1.8cm in diameter. It is small compared to other producing areas [other places are generally 1.5-3.5cm long and 1.0-diameter in diameter). 2.0cm]; the surface is reddish brown or yellowish brown, slightly shiny. It has 7-9 winged edges and branches. Remaining bracts at the top, slightly apically at the base, with residual fruit stalks, thin and brittle skin, lighter and shiny inner surface, with 2-3 raised false diaphragms. Most of the seeds are obovate, gathered into a group, deep red or red-yellow. The surface is dense with small blemishes, and the air is slightly odorous.

The Qingjiang oyster shell is the original medicinal material of eucalyptus. The alluvial states of the Yuanhe River and the Lancang River are all Qingjiang oyster shell trees, which is known as the “hometown of oyster shells”. "Additional fake medicine strips" said: "Jiangxi Shahe is out, the skin is thick and thick, and the color is white and the air is clear and fragrant." In the "Dao Di Medicine Map" (Huadong Volume) prepared by Wang Qiang and Xu Guozhen, the national medicine is discussed. When the main production site wrote: "The main raw material of medicinal materials is produced in Jiangxi Qingjiang... Jiangxi's high quality, with Huanggang, Qingjiang County as the real estate area."