The thirty-fifth hexagram, Jin ("Progress"), places Li (Fire) above Kun (Earth). The sun rising over the earth, mounting higher and brighter, gives the image of swift and easy advance. It follows The Power of the Great in the King Wen sequence.
Jin holds a further position in the xiantian, or Earlier Heaven, arrangement, the binary ordering devised by Shao Yong in the eleventh century and traditionally ascribed to Fu Xi: 59th of 64, apart from its thirty-fifth place in the King Wen sequence above. This was the Fu Xi ordering that the Jesuit Joachim Bouvet sent from Beijing in 1701 to Gottfried Wilhelm Leibniz, who recognized its broken and unbroken lines as his own binary 0 and 1.
Read from the bottom, the six lines of Progress run yin, yin, yin, yang, 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 Kan over Gen, forming hexagram 39, Obstruction (Jian), 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. Progress's King Wen partner is hexagram 36, Darkening of the Light (Ming Yi); 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.