Which means, going by your logic,
1. trains terminating in Jharkhand are also 'typical bihari trains', okay so this somewhat you can consider as Jharkhand is a part of unified Bihar
2. trains terminating in Madhya Pradesh are also 'typical bihari trains'
3. trains terminating in Chhattisgarh are also 'typical bihari trains'
4....
more... trains terminating in Uttar Pradesh are also 'typical bihari trains'
...
...
...
Am I right? Are all Hindi-belt states equal to Bihar?