A complete guide to the Hetu (河圖) numerology system and how Wood, Fire, Earth, Metal, and Water elements determine which lottery numbers resonate with your birth chart.
Most lottery number services produce random picks. Korean Saju takes a different approach: every number carries an elemental signature based on its ones digit. This framework comes from the Hetu (河圖) system — an ancient Chinese numerology tradition embedded in the Five Elements theory. In Saju, the ones digit of any number determines its elemental identity: numbers ending in 1 or 6 belong to Water, 2 or 7 to Fire, 3 or 8 to Wood, 4 or 9 to Metal, and 0 or 5 to Earth.
The logic behind this mapping is not arbitrary. In the Hetu cosmological diagram, the five generative numbers (1, 2, 3, 4, 5) and five completion numbers (6, 7, 8, 9, 10) pair to form element associations. Water generates from 1 and completes at 6. Fire generates from 2 and completes at 7. Wood generates from 3 and completes at 8. Metal generates from 4 and completes at 9. Earth generates from 5 and completes at 10 (mapped as 0). This pairing system gives every number a documented elemental identity, turning abstract digits into meaningful categories.
When you enter your birthday into a Saju analysis, the system derives your personal element profile through the Four Pillars: Year, Month, Day, and Hour columns. Each column maps to a Heavenly Stem and Earthly Branch pairing, and each of those pairings carries an element. The dominant element in your birth chart becomes your personal element. For lottery number selection, numbers whose element matches your personal element are given priority because they are considered to resonate with your birth energy.
Published: 2026-02-24
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