  In this paper, we study $n$-dimensional complete minimal hypersurfaces in a
unit sphere. We prove that an $n$-dimensional complete minimal hypersurface
with constant scalar curvature in a unit sphere with $f_3$ constant is
isometric to the totally geodesic sphere or the Clifford torus if $S\leq 1.8252
n-0.712898$, where $S$ denotes the squared norm of the second fundamental form
of this hypersurface.
