  In these proceedings, we present the measurements of elliptic ($v_2$) and
triangular ($v_3$) flow of (multi-)strange hadrons and $\phi$ mesons in 19.6
and 14.6 GeV Au+Au collisions from STAR. The number of constituent quark (NCQ)
scaling of $v_2$ and $v_3$ holds well at $\sqrt{ s_{\mathrm{ NN }} } $ = 19.6
GeV, which indicates the collective flow is built up in the partonic stage. At
these energies, the anti-particles show better NCQ scaling than the particles
for both $v_2$ and $v_3$, which may be caused by the different contributions
from the produced and transported quarks.
