Yin and yang of the observation. The yin yang (i.e. taijitu symbol) shows a balance between two opposites with a portion of the opposite element in each section. In Taoist metaphysics, distinctions between good and bad, along with other dichotomous moral judgments, are perceptual, not real; so, the duality of yin and yang is an indivisible whole. In the ethics of Confucianism on the other hand, most notably in the philosophy of Dong Zhongshu ( 2nd century BC), a moral dimension is attached to the idea of yin and yang. These Chinese terms "yin" 陰 or 阴 "shady side" and "yang" 陽 or
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