  High $p_{\rm T}$ hadrons in the small systems of $d/^3$He+Au and $p$+Al/Au
collisions have been measured at the midrapidity ($|\eta|<0.35$) as well as at
the forward and backward rapidities ($1.2<|\eta|<2.4$) at
$\sqrt{s_{NN}}$=200GeV. A clear system and centrality ordering in the
$R_{p/d/{\rm HeA}}$ was observed for midrapidity $\pi^0$ production. Hadron
$R_{\rm cp}$ as a function of rapidity in forward and backward regions show an
opposite trend to what HIJING++ predicted. Together with the difference of
$R_{\rm cp}$ in $p$+Al/Au collisions, the observation can be understood
consistently with the measured long-range two-particle correlations, hinting
the possible medium creation similar to A+A collisions.
