Taijitu is "two-part Taiji diagram". Unicode features the "yin-yang symbol" in the Miscellaneous Symbols block, at code point U+262F (YIN YANG ☯). The related "double body symbol" is included at U+0FCA (TIBETAN SYMBOL NOR BU NYIS -KHYIL ࿊), in the Tibetan block. The Soyombo symbol, that includes a taijitu, is available in Unicode as U+11A9E, 𑪞, U+11A9F, 𑪟, and U+11AA0, 𑪠. Ornamental patterns with visual similarity to the "yin-yang symbol" are found in archaeological artefacts of European prehistory; such designs are sometimes descriptively dubbed "yin yang symbols" in archaeological literature by modern scholars. The "taijitu" consists of five parts. Strictly speaking,
Taijitu has its nature. Instead of usual "Taiji" translations "Supreme Ultimate" or "Supreme Pole", Adler uses "Supreme Polarity" (see Robinet 1990) because Zhu Xi describes it as the alternating principle of "yin" and "yang", and ... insists that "taiji" is not a thing (hence "Supreme Pole" will not do). Thus, for both Zhou and Zhu, "taiji" is the "yin-yang" principle of bipolarity, which is the most fundamental ordering principle, the cosmic "first principle." "Wuji" as "non-polar" follows from this. Since the 12th century, there has been a vigorous discussion in Chinese philosophy regarding the ultimate origin of Zhou Dunyi's diagram. Zhu