I Deliver Express Delivery at the End of the World

The red mist is coming, zombies are rampant, and mutant beasts are everywhere. I am the only courier in the apocalypse! To receive an order, you have to risk your life. To deliver antibiotics, you have to break into a mutant dog's den. To deliver serum, you have to walk through a zombie siege. The shipping fee is a pistol, compressed biscuits, or even a pass to the survivor base! While others are hiding in safe areas and surviving, I drive a courier truck and shuttle between life and death. Doomsday express delivery, the mission will be achieved! What's even more surprising is that an anonymous courier actually helped me find my sister who had been separated for three years! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.