Because in the zodiac, earthworm refers to snake, which belongs to dragon snake. So it's the snake zodiac. Earthworms (Geosaurus) are the dried bodies of Eimerier, PvulgarisChen, Pguillelmi(Michaelsen) or PpectiniferaMichaelsen of Anura. The former is called "Guangdilong" and the latter three are called "Ludilong", mainly produced in Guangxi, Guangdong and Fujian.

It is cold in nature and salty in taste, and has the functions of clearing away heat, relieving convulsion, dredging meridians, relieving asthma and diuresis. Can be used for treating cerebral thrombosis, cerebral infarction, coronary heart disease, apoplexy, joint paralysis, limb numbness, hemiplegia, hypertension and other diseases.