The NJ2 is a diesel-electric locomotive used by China Railway in the People's Republic of China. Built in Erie, Pennsylvania, it is based on a standard GE Transportation Systems GE Dash 9-44CW and marketed as GE C38AChe.
It was specially customised for high altitude operation on the Qinghai-Tibet Railway route. It is used on the Qingzang Railway that connects Xining, Qinghai Province, to Lhasa, Tibet Autonomous Region, in the People's Republic of China.