The MBTA reports the first four new Orange Line cars from Chinese manufacturer CRRC arrived in South Boston this morning, from where they will be transported to the Orange Line maintenance facility in Wellington for a year of testing and shakedown runs before they are put in service.

These cars were built in China. The remaining 148 cars will be assembled from Chinese components in a plant in Springfield and delivered, four every month if everything goes according to schedule, through 2022. The Springfield plant will also assemble new Red Line cars.

What the new cars will look like when not covered in plastic.