The implication and symbol of Taiji is the harmony and balance of Yin and Yang.

Taiji diagram is one of the important figures in China traditional culture, which represents the philosophical thoughts of balance, harmony, interdependence and transformation of Yin and Yang. The drawing method of Taiji diagram includes the following steps:

1. Preparation tools: a blank sheet of paper, a pen or brush, and a ruler.

2. Grid division: draw a square in the center of the white paper with a ruler, and then draw a concentric circle in the center of the square. Divide a square and a circle into four equal parts to form eight small squares and eight small arcs with the same size.

3. Draw a fish of yin and yang: Draw a small circle at the center of the Taiji diagram, that is, at the center of the circle, and draw two small arcs around the center from top to bottom to form the shape of a fish. Among them, the black fish head represents yin and the white fish tail represents yang.

4. Filling pattern: the left side of Taiji diagram is filled with black and the right side is filled with white. The gap between them is interlaced with curves, and the curves on both sides echo each other, so that the whole Taiji diagram achieves a balanced and harmonious effect.

5. Decorate the pattern: use a pen or brush to decorate the details on the Taiji diagram, such as outlining the eyes and scales of fish, emphasizing the yin and yang poles, and highlighting the smoothness and coordination of the curve.

To sum up, the painting method of Taiji diagram needs to be sketched, smeared and decorated many times, especially the shape and scale of the Yin and Yang fish in Taiji diagram, and attention should be paid to the symmetry of left black and right white and the coordination of curves between gaps when filling colors. The final Taiji diagram not only has beautiful visual effects, but more importantly, it embodies the philosophy of harmony between Yin and Yang in China's traditional philosophy and culture.