Global Cataclysm: Creating a Protective Umbrella at the Start

Gu Ming plans to travel through time and create a protective umbrella! In this world, there are only 10 days until the end of the world begins! Develop strength and buy and sell powerful guns. Order was established and the base developed rapidly. Establish security and fight off invading enemies. In this world, Gu Ming's company covers the sky with only one hand! Become a behemoth in the wasteland! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.