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We consider the diffusion semigroup (Pt)t≥0 associated to the It(o) SDE with non-uniformly dissipative drift coefficient. By adopting the coupling by reflection and choosing an auxiliary function which is convex near infinity,we establish the exponential convergence of (Pt)t≥0 with respect to the standard Lp-Wasserstein distance for all p≥1.This is a joint work with Jian Wang.