It is for Saharsa pax. Instead of extending the whole train , they are running upto GAYA in two parts utilizing the lieover time of 13227's rake at RJPB , First part 13227 SHC-RJPB & after 10 mins same rake will go as 03313 till GAYA .Passengers can't book direct ticket from Saharsa to Gaya but they can wait at RJPB for 10 mins & train will depart for Gaya