Single protagonist-no cp-space-survival-no saint-ruthless person
The doomsday appears in 2037, natural disasters continue, ten rooms and nine empty houses, order collapses, reorganizes, and collapses again, and the evil of human nature continues to survive. The protagonist accidentally obtained a space after 14 years, but was unable to hold on due to lack of supplies. He died of a natural disaster (earthquake) in 17 years. After being reborn, the protagonist carefully planned the supplies for the disaster year and worked hard to survive.
During the Chinese New Year, my nephew lost all the documents for me, so I had to finish and re-open a book. After I was fifteen, I went home and wrote the outline safely. I started writing the book formally around twenty, and I updated it at 5K a day, so it should be about the same.