The Channel of Money joins the Heart/Ego/Will centre to the Throat centre through Gates 21 and 45, and both of those numbers are borrowed. They are positions in the King Wen sequence of the I Ching, the Chinese divinatory classic whose sixty-four hexagrams Human Design maps one to one onto the sixty-four gates of its bodygraph. Read as I Ching rather than as Human Design, the two numbers name two independent oracle texts.
Hexagram 21, Biting Through (Shi He). Thunder and lightning together. An obstacle lies between the jaws and is bitten through; it is the hexagram of energetic justice, of penalties that clear the obstruction to union.
Hexagram 45, Gathering Together (Cui). The lake gathered over the earth. It is the massing of people, the temple assembly around a centre, and the prudence of keeping weapons ready where crowds gather.
The I Ching itself never sets these two hexagrams in a pair. Each stands alone in the sequence, consulted about a changing situation and answered in counsel that passes. The pairing is a construction of Ra Uru Hu's system, published from 1987, which fixes each hexagram to a position in a birth chart and reads the joined pair as a lasting trait of the person. The correspondence of number is real, and both hexagrams can be followed into their own entries in this atlas; the pairing, and the character read out of it, belong to the modern system alone.