The Yin Yang Symbol is also called Tai-Chi Diagram in China. Tai-Chi is form the philosophy of Taoism. Wu-Chi is the beginning state of Tai-Chi. Then Tai-Chi developed two opposing aspects, a Yin aspect and a Yang aspect. Therefore, Tai-Chi is the original source of Yin and Yang. The philosophy of Tai-Chi covers more than Yin Yang.
In Ming Dynasty, one Tai-Chi diagram showed different from Yin Yang symbol. Tai-Chi diagram has a center hole in the Yin Yang symbol.
How to Draw a Yin Yang Symbol Perfectly?
To make a 4 by 4 grid in a big square first.
Draw two same size small circles inside a big circle
Draw two eyes for Yin Yang and remove the lines
Color and rotate it
The Chinese Old Tai Chi Diagram
Tai Chi Diagram of Ming Dynasty
What is Yin Yang?
What is I-Ching?
River Horse Diagram, Pre-Heavenly Pa-Kua
Lo Shu Turtleback Diagram, Post-Heavenly Pa-Kua
I-Ching: Three Goats Start Fortune
Dragon Philosophy of I-Ching