embodies all potential things including time and space. It is seen as the perpetual cycle of yin and yang.
In the beginning there was Wuji which is Void or nothingness and the Taiji arose from Wuji. It is seen as the perpetual cycle of yin and yang . Yang which is depicted in white contains Yin represented by a small black dot and Yin depicted in black is shown to contain Yang by a small white dot. Yin and yang illustrate the contrasting qualities within reality and experience. For example, light contrasts with darkness, heat with cold, life with death. The Taiji is not perceived as a simple list of all things but rather a complex interconnection of all things. It is representative of what exists, but also that which has existed, will exist and could potentially exist.
Receptive, feminine, dark, passive force, Earth, moon, life, North, conservative, shady place, north slope, winter, constructive, liveliness, interior, stillness, mountain, cold, contracting and downward-seeking. Corresponds to the night and the hours from noon to midnight.
Yin is represented by two unbroken lines: 
Resistant, masculine, bright, active force, Heaven, sun, death, South, aggressive, sunny place, south slope, summer, destructive, apathy, exterior, movement, water, hot, expanding, and upward-seeking. Corresponds to the daytime and the hours midnight to noon.
Yang is represented by one unbroken line: 
Yin and Yang cannot be separated from each other as each contains the other and changes into each other. All forces in nature can be seen as having yin and yang and the two are in movement rather than held in absolute stasis (see above: Ziantian Bagua and Houtian Bagua). From the combination yang qi from Heaven and yin qi from Earth they give birth to five different types of qi (energy) called Wood, Fire, Earth, Metal and Water; this is called Wuxing.
