The End Is Coming and I Have a Red Alert

In 620, a sudden virus swept across the world. Half of the world's population turned into zombies overnight, and less than 20% of the world's population remained in the following week. Zhang Yu, a county battalion commander, survived the apocalypse in his previous life for half a year and returned to the ten days before the outbreak. Obtain the red alert system, restore order, and create a city of hope! Of course, we must also contact our motherland and prepare in advance to reduce losses. When he eliminated the zombies, he discovered that this was just an experiment done by an advanced civilization. The more terrifying Zerg were used as experiments on how to resist. . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.