Armor Piercing Bullets Don't Believe in Carbon-Based Monsters

Description

An ordinary training allowed Chen Jian and his team to enter a completely different time and space.
In the end of the world, monsters are rampant, and the remaining humans are struggling to survive under their terrifying minions.
To fight against the monsters, the living abandons everything.
Human nature does not exist, animal nature is the mainstream.
To defeat them, you must become them first.
Chen Jian should have pursued crazy evolution like the people here.
However, when the tungsten core armor-piercing projectile first penetrated Kuiniu's horny armor, he suddenly discovered...
Perhaps there is another solution to the matter of living?