Preservation Station
The Preservation Station is a production building unlocked at experience level 91.

It is used to make pickles, canned fish, kimchi, and dried fruit.

Building
It costs 950,000 coin and takes 4 days (or 89 dia) to build the Preservation Station. It gives players 44 xp when completed.

Products
Pickles
Canned Fish
Kimchi
Dried Fruit
Guava Compote

Upgrading
The Preservation Station originally has two slots available. Unlocking the third slot costs 6 diamonds. Players can unlock 7 new slots in total, each new one costing 3 more dia than the previous one. Alternatively, they can spend a total of 105 dia to completely upgrade their machine.

Mastering
A total of 2,180 hours of production is required to master the Preservation Station

Strategy tips
Compared to other late game production machines, the Preservation Station is unusually easy to master as kimchis only require field products and take 45 hours to finish a full 9-slot queue. Pickles is an alternative if your Silo can't handle too much crops.