What does fortune-teller Kui Gang mean?

Explain the meaning of fortune teller Kui Gang;

Kui Gang, one of the four pillars gods. Ancient Han numerologists pointed out that it is a kind of star evil spirit with good or bad luck. The Four Gods, Chen Geng and Chen Geng, and Kui Gang in the Reform Movement of 1898, did not see the combination of finance, officials and punishment. Xu is the head of the river, where Yin and Yang are extinct, Chen is the highest day of the reservoir, and Xu is the head of the fire depot. Evil spirits include auspicious spirits and evil spirits. Ghosts and demons originated from the myths and legends of the ancient Han nationality. It is said that it can bring misfortune and happiness to mankind.