He was the second Hebei official to be announced to be under investigation since an anti-corruption campaign began following the 18th Party Congress .
Chen was placed under investigation by the authorities in March 2015 , again for unknown reasons .
Chen was the second Hebei Chen to be announced to be under investigation since an anti-corruption campaign began following the 18th Party Congress .
Chen was placed under investigation by the authorities in March 2015 , again for unknown reasons .