Why is Zhang Zifan blind?

Because Zhang Zifan let the cat out of the bag, he was swallowed and went blind.

Zhang Zifan learned the method of divination from playing chess and could infer the future.

Zhang Zifan's practice of "Five Thunder Days" is already complete, and he can also feel the magnetic field of everything in the world through the achievement method. After all, after becoming the new Shi Tian, Zhang Zifan's position is the executor of heaven.