The K virus broke out, and 90% of the world's population turned into zombies or were hunted by zombies in a short period of time. Only 800 million humans survived on the earth of 510 million square kilometers, and there are countless zombies and mutant creatures. , the sea, and the air, they hunt and kill the remaining human beings all the time...Fang Jinyan, who majored in chemistry, has no guns and ammunition, let alone tanks and cannons, and only has chemical knowledge in his head. Struggle to survive in a terrifying world full of monsters and unpredictable people, and reach the top... It's okay, you will find that it is actually very beautiful.)