  The neutron star as a supernova remnant is attracting high attention recently
due to the gravitation wave detection and precise measurements about its mass
and radius. In the inner core region of the neutron star, the strangeness
degrees of freedom, such as the hyperons, can be present, which is also named
as a hyperonic star. In this work, the neutron star consisting of nucleons and
leptons, and the hyperonic star including the hyperons will be reviewed in the
framework of the relativistic mean-field (RMF) model. The popular non-linear
and density-dependent RMF parametrizations in the market will be adopted to
investigate the role of strangeness baryons in a hyperonic star on its mass,
radius, tidal deformability, and other properties. Finally, the magnitudes of
the coupling strengths between mesons and hyperons also will be discussed,
which can generate the massive hyperonic star with present RMF parameter sets,
when the vector coupling constants are strong.
