Thanks for that Thomas. ..
A little wikipaedia:
Yin (Chinese: 陰/阴; pinyin: yīn; literally "shady place, north slope (hill), south bank (river); cloudy, overcast") is the darker element; it is sad, passive, dark, feminine, downward-seeking, and corresponds to the night. Yang (陽/阳; yáng; "sunny place, south slope (hill), north bank (river); sunshine") is the brighter element; it is happy, active, light, masculine, upward-seeking and corresponds to the day. Yin is often symbolized by water, while Yang is symbolized by fire, or wind.
I know Sandy could answer the question, ... but I might as well, ... Kim is the last name.