Now look at the pictures the Fuxi eight diagrams on the left map. The Hexagram diagram is not used before, not previously seen in the Tang and Song dynasties, the song appeared after this figure.
Now see the figure on the left gossip orientation map. The Gua diagram previously unused, not previously seen in the Tang and Song, Song after only appeared in this figure.
Now look at the picture on the left side of the Fu Xi chart. This is not the diagrams before, had not seen before the Tang and Song Dynasty, the figure appeared in the song dynasty.