Upgraded Seobina Factory (apartment type).
It is a building that collects small factories that make electronic products, electrical parts, mechanical parts, auto parts, and software that are common in Korean industrial complexes.
It consists of the following buildings:
1) 4x4 1G: Industrial level 1, green.
2) 4x4 2B: Industrial level 2, blue.
3) 4x4 3O: Industrial level 3, orange.