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. The back of the body is covered with granular scales. Because it inhabits walls and is good at catching scorpions and flies, it is named gecko. 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".