Armor-piercing Bullets Don’t Trust Carbon-based Monsters

An ordinary training session brought Chen Jian and his team into a completely different time and space.
In the apocalypse, monsters are rampant, and the remaining humans are struggling to survive under the terrifying minions.
In order to fight against the monster, the living people abandoned everything.
Human nature does not exist, animal nature is the mainstream.
If you want to defeat them, you must first become them.
Chen Jian should have pursued crazy evolution like the people here.
But when the tungsten-core armor-piercing bullet penetrated Kui Niu's horny armor for the first time, he suddenly discovered...
Maybe there is another solution to the matter of staying alive?