In the time of the Yellow Emperor, a radiant phoenix held a scroll in its beak atop Xuanyuan Hill. The box it carried was nine inches long on one side, corresponding to the Nine Likely referring to the Nine Palaces or the Nine Numbers of the Luo Shu magic square....

...and eight inches wide, corresponding to the Eight Trigrams. The Yellow Emperor opened and inspected it; within were thirty characters in the Heavenly Seal script and the eighteen chapters of the "Divine Dragon Armor." original: 龍甲神章 (Lóngjiǎ Shénzhāng). This refers to a legendary esoteric text said to be the precursor to Qimen Dunjia, a complex system of divination used for military strategy and determining auspicious timing.

The Song of the Sixty Pillars of the Sexagenary Cycle This table lists the "Melodic Elements" (Nayin), which assign one of the Five Elements and a specific descriptive quality to each pair of years in the 60-year Chinese calendar cycle.