The twenty-second hexagram, Bi ("Grace" or Adornment), places Gen (Mountain) above Li (Fire). Fire glowing at the foot of the mountain, lighting it beautifully, gives the image of form and adornment, the grace that beautifies. It follows Biting Through in the King Wen order.
In the xiantian, or Earlier Heaven, arrangement, the binary order devised by Shao Yong in the eleventh century and traditionally ascribed to Fu Xi, this Bi stands 23rd of 64, apart from its twenty-second position in the King Wen sequence traced above; it was this arrangement the Jesuit Joachim Bouvet sent from Beijing in 1701 to Gottfried Wilhelm Leibniz, who read its broken and unbroken lines as his own binary 0 and 1.
Read from the bottom, the six lines of Grace run yang, yin, yang, yin, yin, yang. A later interpretive layer absent from the original Zhou Yi, the nuclear hexagram (hu gua), treats lines two through four as a lower trigram and lines three through five as an upper one; here they combine as Zhen over Kan, forming hexagram 40, Deliverance (Xie), a hidden figure first associated with the Han-dynasty scholar Jing Fang, whose Yijing commentary of the first century BCE is credited with the earliest appearance of nuclear trigrams. Grace's King Wen partner is hexagram 21, Biting Through (Shi He); most of the sixty-four pair this way, related by turning the whole figure upside down, while the eight hexagrams built from a single doubled trigram pair instead by inverting every line. Mawangdui (1973) orders hexagrams by trigram, not King Wen; names here follow Wilhelm and Baynes, 1950, not Legge, 1882.