I Can Extract HP

Li Xiao woke up to find that he, along with a billion other players, had transmigrated to a future battlefield in another world. Everyone became a commander, owning their own military base, and had to struggle to survive and expand their territory in a strange war-torn world.The only difference was that Li Xiao found that every time he killed an enemy, he could get the corresponding HP, and these HP gathered into a life pool, which he could use at will!Thus, his infantry were like human-shaped bosses, not afraid of bullets and bombs!His tanks seemed to have a shield, unable to be pierced by cannonballs, and missiles couldn't destroy them!His fighter planes became the king of air combat, slaughtering behind the enemy lines, going in and out like no man's land!His warships turned into sea fortresses, seemingly never sinking!