Taijitu during the Qing period for their possible connection with Zhou Dunyi's "taijitu". Ming period author Lai Zhide (1525–1604) simplified the "taijitu" to a design of two interlocking spirals. In the Ming era, the combination of the two interlocking spirals of the "taijitu" with two black-and-white dots superimposed on them became identified with the "He tu" or "Yellow River diagram" (河圖). This version was reported in Western literature of the late 19th century as the "Great Monad", and has been widely popularised in Western popular culture as the "yin-yang symbol" since the 1960s. The contemporary Chinese term for the modern symbol
Taoism in which Taoism continues to be an "order" of the larger body of Chinese religion. Laozi is traditionally regarded as one of the founders of Taoism and is closely associated in this context with "original" or "primordial" Taoism. Whether he actually existed is disputed; however, the work attributed to him—the "Tao Te Ching"—is dated to the late 4th century BCE. Taoism draws its cosmological foundations from the School of Naturalists (in the form of its main elements—yin and yang and the Five Phases), which developed during the Warring States period (4th to 3rd centuries BC). Robinet identifies four components in