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
Popular belief lacks a formal canon. Rituals take place before home altars or at temples, which have no fixed congregations. Adherents vary considerably in belief and practice. Generally, folk religionists are fatalistic yet believe that one's luck can be affected by pleasing ancestors or gods, by locating graves and buildings in places where vital natural forces are located (geomancy), and by balancing opposing forces (yin, yang) within one's body. In Korea, Buddhism, Confucianism, and Taoism have influenced the elite, while a folk religion has existed among the common people that resembles Chinese Folk Religion. However, unlike the Chinese case, most Korean spirit