I recommend "Abyss Files" to you. This novel is about an expedition team formed by the military and civilian explorers to the Abyss of the world to explore the unsolved mysteries of the world. They analyze the two-dimensional country, encounter a maze on the way, virus mutation, ancient country soldiers, geological mutation, the eight palaces under the sea... There was also a scene where the main character and the old man found the supplies left behind by the military and were hunted down by the military. I hope you like this fairy's recommendation. Muah ~😗