  The significantly screened heavy-quark potential in hot medium provides the
possibility to study exotic quantum states of three-heavy-quark systems. By
solving the Schr\"odinger equation for a three-charm-quark system at finite
temperature, we found that, there exist Borromean states which might be
realized in high energy nuclear collisions, and the binding energies of the
system satisfy precisely the scaling law for Efimov states in the resonance
limit.
