Exotic molecular states and tetraquark states with J^P =0⁺, 1⁺, 2⁺ *

We have calculated the mass spectra for $\bar{D}_s^{(*)}D^{(*)}$ molecular states and $sc\bar q\bar c$ tetraquark with $J^P=0^+, 1^+, 2^+$. The masses of axial-vector $\bar{D}_sD^{*}$, $\bar{D}_s^{*}D$ $\mathbf{1}_{[sc]} \oplus \mathbf{0}_{[\bar q \bar{c}]}$, $\mathbf{0}_{[sc]} \mathbf{1}_{[\bar \bar{c}]}$ are predicted to be around 3.98 GeV, which in good agreement $Z_{cs}(3985)^-$ from BESIII \cite{besiii2020Zcs}. In both diquark-antidiquark pictures, our results suggest that there may exist two almost degenerate states, as strange partners $X(3872)$ $Z_c(3900)$. propose carefully examine $Z_{cs}(3985)$ future experiments verify this. One also search more hidden-charm four-quark strangeness not only open-charm channels, but channels $\eta_c K/K^\ast$, $J/\psi K/K^\ast$.