  The time evolution of Mach-like structure (the splitting of the away side
peak in di-hadron $\Delta\phi$ correlation) is presented in the framework of a
dynamical partonic transport model. With the increasing of the lifetime of
partonic matter, Mach-like structure can be produced and developed by strong
parton cascade process. Not only the splitting parameter but also the number of
associated hadrons ($N_{h}^{assoc}$) increases with the lifetime of partonic
matter and partonic interaction cross section. Both the explosion of
$N_{h}^{assoc}$ following the formation of Mach-like structure and the
corresponding results of three-particle correlation support that a partonic
Mach-like shock wave can be formed by strong parton cascade mechanism.
Therefore, the studies about Mach-like structure may give us some critical
information, such as the lifetime of partonic matter and hadronization time.
