Si Xiang-Four Symbols
Sixiang, which literally means “Four Symbols”. The Four Symbols that emerge as Yin and Yang divide and interact in more complex ways.
Four Symbols are four dynamic phases of Yin–Yang transformation. Each of the Four Symbols represents a stage in the interaction between Yin and Yang:
Shaoyin,Lesser Yin Yin growing— South, Summer, Fire
Shaoyang,Lesser Yang Yang growing— East, Spring, Wood
Taiyin,Greater Yin Yin at its peak— North, Winter, Water
Taiyang,Greater Yang Yang at its peak— West, Autumn, Metal