What does the yin and yang symbolize in Chinese culture?

*yin and yang are the two opposing principles in nature

*written in Chinese characters: 阴阳,

they contains 月，日,

which means the Moon and the Sun

*yin yang could mean that:

1.the northern and southern side of a hill

2. the sky and the ground

3. the Moon and the Sun

4. Night and Day

7. Cold and Hot

8. Autumn&Winter and Spring&Summer

9. Thunder&Lighting and Rain&Snow

10. monarch and minister

11. Husband and wife

12. Female and Male

13. Female and Male reproductive organs

14. Close and Open

15. the nether world and the world of the living

....

and a lot more