Man Is in the Last Days: the System Will Help Me Become Bigger and Stronger

[Apocalypse + System + Construction Flow + Modern Standard Weapons] When the earth was shaken by countless meteorite fragments, an internet-addicted boy named Liu Fan was actually hit directly by a meteorite! He thought that the end was coming and that he would die soon, but he didn't expect that a mysterious source system would be activated. "Host, welcome to the end of the world!" The system's mean voice sounded in Liu Fan's mind, "Occupy more territories and unlock more permissions, and you will become the overlord of this end of the world!" Liu Fan rubbed his head that was hit by the meteorite and looked confused: "What? How do I rely on this to eliminate zombies and rebuild civilization?" "That's right, host!" The system replied with a smile, "Pick up your weapon and start your journey! Remember, the more territory you have, the greater your authority!" …