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.
- JS Class 2-8-2
- GJ Class 0-6-0T
- SL6 Class 4-6-2
- KD6 Class 2-8-0
- QJ Class 2-10-2
- SY Class 2-8-2
- GKD1, GKD1A Class
- JF Class 2-8-2
- DF7, DF7B/C/D/F Class
- XK13 Class 0-6-0T
- C2 Class NG 0-8-0
- SS9, SS9G Class
- RM Class 4-6-2
- DFH3 Class
- ET7 Class 0-8-0T
- DF4, DF4A, DF4B Class
- DF4D, DF4DD Class
- DF11 Class
- SS4, SS4G Class
- DF4C Class
- DF8B Class
- DF7G Class
- DF5, DF5B, DF5D Class
- HXD3B/3C/3D Class
- DF8 Class
- Narrow Gauge Electrics
- NYJ1, NZJ1, NZJ2 Class
- EL1 & EL2 Class
- ED85 Class
- ZG100 & ZG150 Class
- 37E Class
- SS3, SS3B Class