  In Standard Model, CP violation arises from an irreducible complex phase in
the quark mixing matrix, now under the name Cabibbo-Kobayashi-Maskawa matrix.
This description has shown remarkably overall agreement with various
experimental measurements. In this review, we discuss recent experimental data
and theoretical developments on three quantities of CKM matrix that are most
uncertain: the $V_{ub}$, including its magnitude and the phase $\gamma$ in
standard parametrization, and the $B_s-\bar B_s$ mixing phase $\beta_s$.
