  In this article, we study the masses and pole residues of the
pseudoscalar-diquark-pseudoscalar-antidiquark type and
vector-diquark-vector-antidiquark type scalar hidden-charm $cu\bar{c}\bar{d}$
($cu\bar{c}\bar{s}$) tetraquark states with QCD sum rules by taking into
account the contributions of the vacuum condensates up to dimension-10 in the
operator product expansion. The predicted masses can be confronted with the
experimental data in the future. Possible decays of those tetraquark states are
also discussed.
