  We present new high signal-to-noise ratio spectra of the components B and C
of the gravitational lensing system MG2016+112. We show that image C displays
strong emission lines of Ly$\alpha$, \NV, \CIV, \HeII, and \CIII redshifted to
z=3.27, similar to images and B. We examine the emission-line flux ratios in
order to put constraints on the lens models as well as to investigate the
intrinsic nature of MG2016+112. The observed line ratios of B and C are
consistent with those expected in the simple photo-ionization models for
narrow-line region of active galactic nuclei (AGN) except for the enhanced \NV\
lines. The line ratios difference of components B and C can be interpreted as a
difference in ionization parameters. This result is consistent with lens model
prediction that C is a fold image of a slightly outer part of the nucleus.
MG2016+112 is known to be very unique among the high-redshift AGN; it is
neither an ordinary broad-line quasar nor a powerful radio galaxy as indicated
by the width and flux ratio of the emission lines. Together with other observed
properties discussed in literature, we argue that MG2016+112 is the highest
redshift luminous radio-quiet type-2 quasar.
