  In this paper we consider closed non-collapsed ancient solutions to the mean
curvature flow ($n \ge 2$) which are uniformly two-convex.
  We prove that any two such ancient solutions are the same up to translations
and scaling. In particular, they must coincide up to translations and scaling
with the rotationally symmetric closed ancient non-collapsed solution
constructed by Brian White in (2000), and by Robert Haslhofer and Or
Hershkovits in (2016).
