Taijitu the Tibetan designs have three or four swirls (representing the Three Jewels or the Four Noble Truths, i.e. as a triskele and a tetraskelion design), Lai Zhide's taijitu has two swirls, terminating in a central circle. The Ming-era design of the taijitu of two interlocking spirals has been reported as "yin-yang symbol" in the first half of the 20th century. The flag of South Korea, originally introduced as the flag of Joseon era Korea in 1882, shows this symbol in red and blue. This was a modernisation of the older (early 19th century) form of the Bat Quai Do used
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