Complex sentence: Consequently many tram cars were replaced with type DL6WA cars, while 27 cars of type DL3000 built by Japanese in 1930s are still remained and serving on the merged route 201 after retrofitting.
Split into simpler sentences: Consequently many tram cars were replaced with type DL6WA cars. Today 27 cars of type DL3000 built by Japanese in 1930s still remain and serve on the merged route 201 after retrofitting.