Survival in the End of the World: 1 Million Zombies at the Beginning

This world suddenly became a "Zombie Survival" game world. At the beginning of the game, 1 million people were randomly selected as the mother zombies. Perhaps, the best way to survive is to collect supplies and then survive. Chen Yang, accidentally got the system to upgrade everything. A piece of bread was upgraded to 12 pieces. A wooden door was upgraded to a steel door. A pistol was upgraded to a cannon. An AI beauty doll was upgraded to a beautiful maid. While others were still struggling to survive, Chen Yang had already lived a plain and boring life. Taste a thousand-year-old wine and snipe a hundred-year-old zombie king. Or, be the richest man for fun...