The $Q_\mathrm{CP}$ of ${\rm K^{*0}}$ (red circles) and $\phi$ (blue squares) mesons as a function of rapidity for 0$-$10$\%$ / 40$-$100$\%$ (solid markers) and 10$-$40$\%$ / 40$-$100$\%$ (open markers) in p$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. The solid and doted lines represents the linear fit to data. The statistical and systematic uncertainties are represented by vertical bars and boxes on the measurements, respectively.