七起八发 (qǐ qǐ bā fā) — rising to prosperity through double zeros symbolizing completeness. Seven begins ascent (起), eight brings wealth (发财). Number of contemplating millionaires.
History
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Western numerology
A thinker's number that never forgets the earthly realm. Seven seeks profound truths, eight manifests them in reality. Root six transforms these quests into service to loved ones.