Champaran HumSafar Express : इन अजनबी सी राहों में, जो तू मेरा हमसफ़र हो जाये, बीत जाए पल भर में ये वक़्त, और हसीन सफ़र हो जाये. - Piyush Singh

Seems to be a pure LHB coach only. In the pics in the trains gallery, all the coaches are having the Y-shaped FIAT bogies that are seen only on LHB coaches. This particular coach looks like a coach from 04402 UHP-ANVT special, which has self-generating LHB coaches ( these have lesser MPS than pure LHB coaches, 105-120 kmph).
/train/gallery/23055/2819/7322

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