Gecko is a reptile belonging to the gecko genus in the gecko family. The body is relatively flat, with a total length of 10-15 centimeters, and the length of the tail and head is basically the same. Gecko is distributed in Guangxi, Guangdong, Fujian, Yunnan and other places in China; They prefer to live in secluded places such as between walls and under eaves, and appear on ceilings and walls at night, hunting insects such as mosquitoes and flies. The medicinal value of geckos is very high, and they can be used to treat conditions such as epilepsy, scrofula, tuberculosis, and swelling. Their dried products are called "Tianlong". In the "Compendium of Materia Medica" written by Li Shizhen in the Ming Dynasty, geckos were referred to as "immortal toads". It has the effects of relieving cough and asthma, relieving spasms and dispelling wind, nourishing liver and kidney, nourishing essence and blood, and dispersing and reducing swelling.