After the End of the World, I Explode an Army of Millions

[Explosion flow] [Zombies] [Decisive killing] [Not brainless, not holy mother] [Realistic version of the zombie defense mini-game] Wang Yao woke up and found that he had traveled to the apocalyptic Blue Star in the parallel world, and there were zombies knocking on the door outside the house. Fortunately, at a critical moment, the awakening summoning soldier system can summon biochemical soldiers from another world to fight for him. When he learned that 99% of the world's creatures had turned into zombies, he was desperate. And when he upgraded the system to version 2.0 In the shortest possible time, the system prompt sounded: "Ding! Congratulations to the host, you completed the system upgrade within 12 hours, and will be rewarded with 'Biochemical Soldier Elite Combat Team'*1." "'Elite Combat Team of the King of Biochemical Soldiers': They are a group of kings of biochemical soldiers armed with 95-1 automatic rifles that never wear out and have endless bullets. They can fight for you in all directions and sweep away all enemies." Not long after, just when Wang Yao was in a new danger, the system issued a new mission again: [Iron Wall]. During the mission, for every 1,000 zombies killed, you can get an additional 1,000 energy points, and the mission reward is five groups of M134 rapid-fire machine gun combat groups with no loss and unlimited bullets. Wang Yao relied on the system to build the strongest army and the strongest base city... He summoned biochemical soldiers, genetic warriors, transforming robots, and Apocalypse tanks. He is calling the shots in this doomsday that everyone avoids. The survivors of China are all begging him to become a warlord. You say this is the end of the world? "I said this world will never end." "Yes, that's what I said."