  This proceeding briefly summarizes our recent VISHNU hybrid model
investigations on the chemical and thermal freeze-out of various hadrons
species in 2.76 A TeV Pb+Pb collisions. Detailed analysis on the evolution of
particle yields and the last elastic collisions distributions during the
hadronic evolution reveals that the two multi-strange hadrons, $\Xi$ and
$\Omega$, experience early chemical and thermal freeze-out when compared with
other hadron species.
