  In this article, we study the axialvector-diquark-axialvector-antidiquark
type scalar, axialvector, tensor and vector $ss\bar{s}\bar{s}$ tetraquark
states with the QCD sum rules. The predicted mass $m_{X}=2.08\pm0.12\,\rm{GeV}$
for the axialvector tetraquark state is in excellent agreement with the
experimental value $(2062.8 \pm 13.1 \pm 4.2) \,\rm{MeV}$ from the BESIII
collaboration and supports assigning the new $X$ state to be a
$ss\bar{s}\bar{s}$ tetraquark state with $J^{PC}=1^{+-}$. The predicted mass
$m_{X}=3.08\pm0.11\,\rm{GeV}$ disfavors assigning the $\phi(2170)$ or $Y(2175)$
to be the vector partner of the new $X$ state. As a byproduct, we obtain the
masses of the corresponding $qq\bar{q}\bar{q}$ tetraquark states. The light
tetraquark states lie in the region about $2\,\rm{GeV}$ rather than
$1\,\rm{GeV}$.
