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
Zhou Dunyi natural world. Many Confucians believed that he embodied the virtue of "authenticity". He had great insight into the Way of Heaven. The first major popularization of the taijitu symbol is also credited to Zhou Dunyi; this symbol (in an altered form) is now known worldwide as the commonly accepted symbol for the Chinese concepts of yin and yang. Zhou Dunyi Zhou Dunyi (; 1017–1073) was a Song dynasty Chinese Neo-Confucian philosopher and cosmologist born during the Song Dynasty. He conceptualized the Neo-Confucian cosmology of the day, explaining the relationship between human conduct and universal forces. In this way, he emphasizes