In traditional Chinese philosophy, natural phenomena can be classified into the Five Elements ():wood,fire,earth,metal, andwater(木, 火, 土, 金, 水; mù, huǒ, tǔ, jīn, shǔi). These elements were used for describing interactions and relationships between phenomena. Five phases is another way of translating wǔxíng — literally, "five goings". Traditional Taijiquan schools relate them to footwork and refer to them as five "steps".