Do you have a question about the LEGO 7938 CiTY and is the answer not in the manual?
Assembling the base plate and interior seating for the passenger car.
Constructing the passenger car walls and integrating windows.
Adding the roof structure and final exterior details to the passenger car.
Building the base and initial structure for the locomotive front.
Adding final details, lights, and aerodynamic elements to the locomotive.
Assembling the bogie frames and integrating wheels and axles.
Attaching the assembled bogies and locomotive to the main train body.