QingYang gong temple - Yin and yang (taijitu)
The Taijitu is the Taoist symbol (shown also in Confucianism) symbolizing harmony. Yin is black or blue, while yang is white or red.
This symbol means that one the two "opposing" can not exist without the other, and they can also transform one another. Examples of yin : female, inside, low, cold, motionless,
dark, visible, odd, water, passive, house ... Examples of yang : male, outside, high, hot, mobile, clear, invisible, even, fire, active, garden...