History of Taoism These Zhenren spoke of an apocalypse which was to arrive in 384, and claimed that only certain people from this aristocratic circle had been chosen to be saved. For the first century of its existence, Shangqing Taoism was isolated to this aristocratic circle. However, Tao Hongjing (456–536) codified and wrote commentaries on Yang Xi's writings and allowed for the creation of Shangqing Taoism as a popular religion. The Lingbao scriptures added some Buddhist elements such as an emphasis on universal salvation. Also during the Six Dynasties period, the Celestial Master movement re-emerged in two distinct forms. The Northern Celestial Masters
Taijitu and called the "River Chart spontaneously generated by Heaven and Earth". By the end of the Ming period, this diagram had become a widespread representation of Chinese cosmology. The dots were introduced in the later Ming period (replacing the droplet-shapes used earlier, in the 16th century) and are encountered more frequently in the Qing period. The dots represent the seed of yin within yang and the seed of yang within yin; the idea that neither can exist without the other. Lai Zhide's design is similar to the "gakyil" ("dga' 'khyil" or "wheel of joy") symbols of Tibetan Buddhism; but while