China＇s　banking　system　has　been　experiencing　reforms　since　China　joined　the　World　Trade　Organization　in　2001.　A　very　significant　act　is　opening　the　banks　to　foreign　strategic　investors　as　minority　share　owners.　This　paper　applies　stochastic　frontier　analysis　(SFA)　to　investigate　the　effects　of　minority　foreign　ownership　on　efficiencies　of　Chinese　big　commercial　banks　by　using　a　panel　data　over　the　period　of　2003-2008.　Empirical　results　suggest　that　foreign　strategic　investments　do　not　have　distinct　effects　on　bank　efficiency　of　China　as　a　whole,　while　there　are　notable　improvements　of　state-owned　banks　from　reforms　that　increase　the　role　of　foreign　ownership　and　go　public.