The BJ was a compact powerful B-B diesel-hydraulic design equipped with a medium speed engine. The class was built at Beijing Feb 7th Works from 1975 to 1991 and dominated passenger traffic around the capital until the early 1990s. They were later cascaded to secondary lines before withdrawal.
- SS3, SS3B Class
- 37E Class
- ZG100 & ZG150 Class
- ED85 Class
- EL1 & EL2 Class
- NYJ1, NZJ1, NZJ2 Class
- Narrow Gauge Electrics
- DF8 Class
- HXD3B/3C/3D Class
- DF5, DF5B, DF5D Class
- DF7G Class
- DF8B Class
- DF4C Class
- SS4, SS4G Class
- DF11 Class
- DF4D, DF4DD Class
- DF4, DF4A, DF4B Class
- ET7 Class 0-8-0T
- DFH3 Class
- RM Class 4-6-2
- SS9, SS9G Class
- C2 Class NG 0-8-0
- XK13 Class 0-6-0T
- DF7, DF7B/C/D/F Class
- JF Class 2-8-2
- GKD1, GKD1A Class
- QJ Class 2-10-2
- KD6 Class 2-8-0
- SL6 Class 4-6-2
- GJ Class 0-6-0T
- JS Class 2-8-2
- SY Class 2-8-2
- YJ Class 2-6-2