  We report the production and azimuthal anisotropy measurements of strange and
multi-strange hadrons at STAR BES energies. The $\Lambda/K^0_s$ ratio is
reported at 3 GeV and observed to increase faster with transverse momentum than
that at higher energies. The number-of-constituent quark (NCQ) scaling of $v_2$
has been studied at 19.6 GeV (BES-II). The NCQ scaling holds for particles and
anti-particles, which can be considered as an evidence of partonic
collectivity. The production of $K^{*0}$ resonance is also reported for 7.7-39
GeV (BES-I) and the $K^{*0}/K$ ratio suggests that hadronic re-scattering
dominates over regeneration in central A+A collisions. Using the $K^{*0}/K$
ratio, we also report the lower limit of hadronic phase lifetime $( t_{kin} -
t_{chem} )$.
