This　paper　investigates　the　large-time　asymptotic　behavior　of　contact　waves　in　1-D　compressible　Navier-Stokes　equations.　We　derive　the　optimal　decay　rate　for　generic　initial　perturbations,　meaning　the　perturbation＇s　integral　does　not　need　to　be　zero.　It　is　well-known　that　generic　perturbations　in　Navier-Stokes　equations　generate　diffusion　waves,　implying　that　the　optimal　decay　rate　for　contact　waves　in　the　L　infinity-norm　is　(1　+　t)　-1　/　2　.　However,　the　presence　of　diffusion　waves　introduces　error　terms,　leading　to　energy　growth　in　the　anti-derivatives　of　the　perturbations.　Furthermore,　studying　contact　waves　depends　on　certain　structural　conditions,　which　hold　for　the　original　system　but　not　for　its　derivative　systems.　This　makes　it　challenging　to　obtain　accurate　estimates　for　the　energy　of　the　derivatives.　In　this　paper,　we　refine　the　estimates　for　both　anti-derivatives　and　the　original　perturbations.　We　then　introduce　an　innovative　transformation　to　ensure　that　the　structural　conditions　continue　to　hold　for　the　system　of　derivatives.　With　this　approach,　we　achieve　better　estimates　for　the　derivatives,　leading　to　the　optimal　decay　rates.　This　result　improves　upon　the　wellknown　findings　of　Huang　et　al.　(2008),　and　the　method　has　the　potential　for　application　in　more　general　systems.