Lalu since he became RM has been extending some high quality trains like Manikarnika, Gang Kaveri, Tapti Ganga etc etc to mediocre and small cities like Chhapra..
Purvanchal has made lots of sacrifices including Pawan, Sabarmati, Rapti Sagar, Gyan Ganga for Bihar.
And let's not forget the fact that Purvanchal is an influential region that's why PM, CM, Opposition Leaders be it Central or State everyone fights from Purvanchal. It has got its share, that too let's not mention after 2014 some trains are just weekly or slow that originates from GKP or...
more... BSB, the region has lost many trains for that exclusively better one's.