C1027 Vortex
Zhang Cheng did not think that yin and yang were the opposite. Although yin and yang were indeed the opposite, it did not mean that there would be no yin where there was yang. Furthermore, Zhang Cheng felt that he was right.
It was very possible that it was the direction given by the Extreme Yin Stream Water. Apart from the Yangdao, the rest of the area was located in the yin