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The LHCb collaboration has recently measured the first direct CP violation in$B^0_s$ decays with a rate asymmetry $A_{CP}(B^0_s\to K^- \pi^+)$ given by$0.27 \pm 0.04(stat)\pm 0.01(syst)$. At the same time they also made the mostprecise measurement for $A_{CP}(B^0 \to K^+ \pi^-) = -0.080\pm 0.007(stat)\pm0.003(syst)$. These data confirm the predicted relation, $A_{CP}(B^0 \to K^+\pi^-)/A_{CP}(B^0_s \to K^- \pi^+) = - Br(B^0_s\to K^- \pi^+)\tau_{B^0}/Br(B^0\to K^+ \pi^-)\tau_{B^0_s}$, in the standard model with SU(3) flavor symmetry.We discuss possible modifications due to SU(3) breaking effects to thisrelation. There are several other similar relations in B decays. Using currentavailable data we study whether relevant relations hold in $B^0$ and $B^0_s$ to$PP$ and $PV$ decays. Here $P$ and $V$ indicate pesudoscalar and vector mesonsin the flavor octet representations.

CP Violation in $B^0_s \to K^-\pi^+$, $B^0 \to K^+\pi^-$ Decays and Tests for SU(3) Flavor Symmetry Predictions