  In this talk we address two topics: The first one is an empirical explanation
in terms of a new state $h_1$ of the peak in the $K^{*0}\bar{K}^{*0}$ invariant
mass distribution close to threshold of this channel in the $J/\psi \to \eta
K^{*0}\bar{K}^{*0}$ decay. The second one is a theoretical description of the
isospin $I=1$ $Z_c(3900)$ and $Z_c(4020)$ states in terms of molecular states
of $D \bar D^*+ cc$ and $D^* \bar D^*$.
