hi,
i have already asked that question, but i didn't get any answer.
1. i'm looking for folklore stories of yin and yang in chinese medicine.
i need this answer in the next 3 hours...
thank you
michal

Hi. I don't know how to answer a question, but I have searched anyway
and here is what I managed to come up with:

I have read through over 30 of the most common folklore stories and
the only one that directly refers to yin and yang is
"YU-HUANG-SHANG-T":
   "Father Heaven." The August Supreme Emperor of Jade, whose court is
in the highest level of heaven, originally a sky god. The Jade Emperor
made men, fashioning them from clay. His heavenly court resembles the
earthly court in all ways, having an army, a bureaucracy, a royal
family and parasitical courtiers. The Jade Emperor's rule is orderly
and without caprice. The seasons come and go as they should, yin is
balanced with yang, good is rewarded and evil is punished. As time
went on, the Jade Emperor became more and more remote to men, and it
became customary to approach him through his doorkeeper, the
Transcendental Dignitary. The Jade Emperor sees and hears everything;
even the softest whisper is as loud as thunder to the Jade Emperor.
Source: http://www.demoway.com/chinamask/mythology024.htm

You might like to consider how the principles of yin and yang are
manifested in folklore. If would love to research this for you,
however first I must become an 'answerer'!

=) Cheers , Lisa

Yin and Yang also play a huge role in the myths on creation. 

"In some creation myths, in a sense both the World Parents are present
in the egg as a single, androgynous being. For example, in a Chinese
myth, inside the Cosmic Egg are Yin and Yang, i.e. sexuality as an
abstract principle. In other Cosmic Eggs there are a pair of twins who
may work together OR be opposed to each other. The twins may be male
and female. In such instances the connection between the Cosmic Egg
and the womb is obvious.

Basic to the Chinese conception of the universe is its division into
two complementary essences, Yin (shaded) and Yang (sunlit) which
together comprise the whole.Yin is female, dark, earthy, passive,
submissive, cool. Yang is male, bright, celestial, active, aggressive,
warm. Just as male and female unite among humans, the sun god
representing Yang marries the moon goddess representing Yin. Heaven
and earth thus represent complementary aspects of the whole."
Source: http://www.usd.edu/~jsebesta/japan.html

You might consider reading about The Infinate and Supreme Ultimate for
that is what the mixture of Yin and Yang is:
http://www.eng.taoism.org.hk/daoist-beliefs/yin-yang&supreme-ultimate/pg2-3-2.asp
- 2 articles loacted here.

Or Yin-Yang and the Five Agents:
http://www.eng.taoism.org.hk/daoist-beliefs/yin-yang&supreme-ultimate/pg2-3-3.asp
- another 2 simple articles.

Perhaps I am totally off track and am not helping, but I like to think
that I am. I'm not being paid anyway :P
- Lisa