In this short paper, we show that the peeling property still holds for Bondi-Sachs metrics with nonzero cosmological constant under the new boundary condition with nontrivial B, X, Y obtained in [6]. This should indicate the new boundary condition is natural. Moreover, we construct some nontrivial vacuum Bondi-Sachs metrics without the Bondi news. This provides a new feature of gravitational waves for nonzero cosmological constant. 查看全文>>