I Have A Space For Planting

Zhang Cheng was just a normal salaryman at the age of 26.
Just like everyone else, he worked from 9 to 5 every weekday.
However, he had a bug.
When he was 23-year-old, he received a space that was connected to another dimension.
The space was about half an acre big.
He could use the space the raise crops and animals.
Yet, he could only take the harvested crops out of the space or only insert things that the space needed. He couldn’t do anything else with it.
The only upside was he could exchange his harvest for points to upgrade the space.
Three years later, he finally had 300 points for the upgrade.
He received another space, and in this space…