Doomsday Shelter's Brain Teaser Lottery Machine

Xian Du is just an ordinary sports student. After the apocalypse strikes, he is trapped in a sewer, with his only reliance being a bizarre lottery machine cobbled together from plastic bags and trash. This machine eats anything and draws anything—things needed, things not needed now but might be needed in the future, things that will always be needed, everything is possible. Is there anything not needed? In the apocalypse, everything is needed. When the city is swept by bloodthirsty mutant wolves, when the scarlet truth surfaces, when the global broadcast echoes through the ruins—facing disasters that could wipe out the group at any moment, in this urban survival, can the lottery machine give one more miracle?