Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Internally, in terms of their electrical and mechanical components, the Red Flag 2000-class locomotives are based on the Red Flag 1-class, but with Bo-Bo wheel arrangement, riding on two-axle roller bearingbogies. The boxy body is of a hood-type design, with a cab at one end, external walkways around the long hood. They are generally operated with the long hood forward. Producing 2,120 kilowatts (2,840 hp), they entered service in 1968. At least 43 were built, numbered 붉은기2001 to 붉은기2043, and most are painted in the standard light blue over dark blue livery, though a few have been noted in the newer two-tone light green over dark green scheme. One locomotive, number 2015, carries special titles on the sides reading Chŏngju Sŏnyon-ho (정주소년호, "Chŏngju Youth-class"). This is a feature shared with rebuilt locomotives of the Red Flag 1 and Red Flag 2 classes, but it is not known if this means this unit has been rebuilt.
References
"Electric locomotives 50 times". The Pyongyang Times. October 26, 1985. p. 5.
Kokubu, Hayato (January 2007). 将軍様の鉄道 (in Japanese). Shōgun-sama no Tetsudō. ISBN978-4-10-303731-6.
"【原创】朝鲜铁路机车车辆概况一览 -- 一介书生" [ Korea List of railway rolling stock before - scholar]. cchere.com (in Chinese). July 2, 2013.