After you have the diagram, construct the product on the assembly station.
The Bus Station (Diagram) is given when accepting said mission on Commission Board during the Mission: South Block Development.
Alternatively, the diagram can be bought from the Research Center Exchange for 36 .
The Bus Station (Diagram) can be used to learn how to make Bus Stations.
4 Waterproof Lamp
4 Steel Shell
3 Iron Wooden Plank
6 Bronze Pipe