Most of the bodygraph works by connection between distant parts: a gate in the Root reaching a gate in the Spleen, a Sacral gate reaching the Throat. Four gates do something different, and they are the most distinctive piece of structure in the whole diagram.
Gates 10, 20, 34 and 57 connect only to each other. Every possible pairing among the four is a real channel, giving six: 10-20, 10-34, 10-57, 20-34, 20-57 and 34-57. Practitioners call these the Integration channels, and the group is closed in a way nothing else in the graph is.
What the four bring together is unusual. Gate 34 sits in the Sacral and is treated as pure undirected power. Gate 57 sits in the Spleen and carries instantaneous intuitive awareness. Gate 20 sits in the Throat and carries expression in the present moment. Gate 10 sits in the identity centre and carries behaviour true to itself. Power, awareness, voice and self, wired directly together with nothing else intervening.
Human Design reads this cluster as concerned with individual survival rather than with relationship, and holds that its characteristic quality is being fully present and self-sufficient rather than useful to anyone else. Gate 34 in particular is described as power that is not designed to help, which is an unusual thing for a system of this kind to say.
Structurally the arrangement is elegant, and it is worth being clear about where it comes from. The King Wen numbers 10, 20, 34 and 57 have no particular relationship to one another in the I Ching, where they are Treading, Contemplation, The Power of the Great and The Gentle. Their grouping into a closed quartet is entirely Ra Uru Hu's design decision, made in 1987.