In the Taoist theory of the five elements (Taoism is a naturist philosophy and science born in China in the seventh century BC which, from the observation of nature, intuited the laws that regulate its events), wood is the first element because it comes from spring , whose forces create the wind in the sky and the wood on the earth. From wood everything is born and everything is brought back to wood: the wood burns to produce the fire whose ashes generate the earth in whose belly it is born and then the metal is extracted which dissolved becomes water which, nourishing plants and trees, generates wood again. In an eternal and cyclical balance, marked by the complementary forces of Yin and Yang.