Seeing the Zombie King showing fear because of the machine cannon,
Wu Heng was also somewhat surprised.
It seemed that, with the nurturing of the Corpse Core, the intelligence of this Zombie King was also increasing.
He might not recognize the machine cannon, but he probably knew it was a weapon capable of killing him, thus he stayed quiet to avoid provoking it.
No, it's possible that the Zombie King had indeed seen the machine cannon before.
The place where he was captured, the Korea Rescue Team had arranged for the military to forcefully attack, which definitely involved the use of corresponding modern weapons.
Perhaps it was the awareness of the weapon's power that made him choose to stay quiet.
Either way, it proved that the Zombie King's intelligence was increasing.
It was unknown whether he would eventually evolve intelligence not inferior to humans.
By then, would he also belong to a new race?
Just like the various strange races in the Otherworld.