  The PMNS matrix displays an obvious symmetry, but not exact. There are
several textures proposed in literature, which possess various symmetry
patterns and seem to originate from different physics scenarios at high energy
scales. To be consistent with the experimental measurement, all of the
regularities slightly decline, i.e. the symmetry must be broken. Following the
schemes given in literature, we modify the matrices (9 in total) to gain the
real PMNS matrix by perturbative rotations. The transformations may provide
hints about the underlying physics at high energies and the breaking mechanisms
which apply during the evolution to the low energy scale, especially the
results may be useful for the future model builders.
