It is a science fiction novel based on the fictional background of the reform of state-owned enterprises more than 20 years ago. The characters in the story all come from the fictional big factory "Factory 839" in the novel. With the disintegration of the factory, a disaster that will destroy the human world also comes. Over the past 20 years, the five children of the big factory from Factory 839 have... Either for themselves or for others, they are constantly looking for the only remaining sky ball on the earth, because only this sky ball, which has made the 839 Factory glorious for decades, can save mankind... However, during their search journey, they discovered that they are not the only ones searching for the whereabouts of the only remaining sky ball, and a crisis is quietly approaching...
