BESIII firstly observedtetraquark stateZcs(3985) (Red shaded area). In the March 12th, 2021 issue of Physical Review Letters,the particle and nuclear physics team in Lanzhou Universityand University of Chinese Academy of Sciences reportsthe discovery of an exotic multi-quark structure, dubbed the Zcs(3985). This is the first candidate for a tetra-quark meson containing hidden-charm with non-zero strangeness. This paper was selected as one of that issue’s "Editors' Suggestion" and prominently fea...