Survival in the Apocalypse: 1 Million Mother Zombies at the Start

This world suddenly became a "zombie survival" game world. At the beginning of the game, 1 million people are randomly selected as mother zombies. Perhaps the best way to survive is to collect supplies and survive. Chen Yang, accidentally got the upgrade system for all things. One 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, upgraded to a stunning maid. While others were still hanging on for dear life, Chen Yang had already lived a simple and boring life. Sip a thousand-year-old wine and snipe a century-old zombie king. Or, be the richest man for fun...