  With SU(3) symmetry one only needs 13 hadronic parameters to describe $B\to
PP$ decays in the Standard Model. When annihilation contributions are
neglected, only 7 hadronic parameters are needed. These parameters can be
determined from existing experimental data and some unmeasured branching ratios
and CP asymmetries of the type $B\to PP$ can be predicted. In this talk we
present SU(3) predictions of branching ratios and CP asymmetries for $B\to PP$
decays in the Standard Model.
