  Plenty of crucial information about our Universe is encoded in the cosmic
large-scale structure (LSS). However, the extractions of these information are
usually hindered by the nonlinearities of LSS, which can be largely alleviated
by various techniques called as the reconstruction. In realistic applications,
the efficiencies of these methods are always degraded by many limiting factors,
the quite important one of which is the shot noise induced by the finite number
density of biased matter tracers (i.e., luminous galaxies or dark matter halos)
in observations. In this work, we investigate the gains of biased tracer
reconstruction benefiting from halo mass information, which can suppress the
shot noise component and tightens the correlation between halo field and dark
matter. In conclusion, we confirm that halo masses indeed are critical
information for significantly improving the performance of biased tracer
reconstruction, demonstrating an enormous application potential for
substantially promoting the precision of cosmological measurements [especially
for baryon acoustic oscillations (BAO)] in the ambitious on-going and future
galaxy surveys.
