Zhang Cheng, 26, is an ordinary worker who spends his days tightening screws. However, he has a secret: a half-acre space he obtained at age 23. This space allows him to plant and raise crops and livestock. While he can take the harvest out, and put things into the space, it lacks features like a spatial ring. The harvest can be exchanged for space points to upgrade the space. After three years of accumulation, he finally has 300 points to upgrade. Zhang Cheng gains another space, and this space...