PQCD approach to exclusive B decays

I review the recent progress on the perturbative QCD approach to exclusive $B$ meson decays, discussing the comparison of collinear and $k_T$ factorizations, the CP asymmetry in the $B^0\to\pi^+\pi^-$ decay, penguin enhancement, the branching ratio of the $B^0\to D^0\pi^0$ decay, and three-body nonleptonic decays