  In this paper, we construct a general bulk wave packet in the AdS/CFT
correspondence. This wave packet can be described both in bulk and CFT
descriptions. Then, we compute the time evolution of the energy density of this
wave packet state on the vacuum in the CFT picture of $AdS_3/CFT_2$. We find
that the energy density of the wave packet is localized in two points, which
means that the bulk wave packet corresponds to two light-like particle-like
objects in the CFT picture. Our result implies that the entanglement wedge
reconstruction given in [1] is invalid.
