Under the Pa Kua arrangement of numbers 1 to 9 have the following relationships.
- Number 1 is WATER
- Number 2 is BIG EARTH
- Number 3 is BIG WOOD
- Number 4 is SMALL WOOD
- Number 5 is MEDIUM EARTH
- Number 6 is BIG METAL
- Number 7 is SMALL METAL
- Number 8 is SMALL EARTH
- Number 9 is FIRE
