  The Backlund transformation related symmetry is nonlocal, which is hardly to
apply in constructing solutions for nonlinear equations. In this paper, we
first localize nonlocal residual symmetry to Lie point symmetry by introducing
multiple new variables and obtain new Baaklund transformation. Then, by solving
out the general form of localized the residual symmetry, we reduce the enlarged
system by classical symmetry approach and obtain the corresponding reduction
solutions as well as related reduction equations. The localization procedure
provides a new way to investigate interaction solutions between different
waves.
