Idea architects who build bridges between dreams and reality. Creative energy of 3 lays foundation on solid 4, wisdom of 9 completes the project. Root 7 transforms them into truth seekers.
History
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Chinese numerology
Ascending path from life (三, sān) through trials of four (四, sì) to imperial longevity (九, jiǔ). Tetraphobia here isn't obstacle but springboard to eternity. Growth sequence where each step leads higher.