Since1840,after100years,theForbiddenCityhasneverbeenlarge-scalemaintenance.

　　AfterthefoundingofNewChinain1949,ForbiddenCityPalaceMuseumthroughtheconstructionofthecensus,theproblemsfortheForbiddenCity,theimplementationofthePalacerestorationofancientbuildingsfirstfive-yearhistoryofgovernanceandemergencyplanning,andfundamentallychangedtheoldsociety,leavingPalaceBrokenfaceofthedesolate,soshowmagnificentscale.

　　In1973,theinstructionsoftheCentralNationalPalaceMuseum,thesecondfive-yearplantodevelopa"NationalPalaceMuseum,five-yearrepairprotectionplan."Inadditiontostrengtheningtheplanningrestorationofancientbuildings,themaininvolvetheinstallationofheatpipes,cableengineering,sewagepipelineengineering,lightningprotectiondevices,andmany,manyprofessionalprotection.

　　TheImperialPalacesince2002overhaulplan,hastocontinueuntil2020.Thisopenedupsomeoftherepairphaseaftertheadditionofattractions,butalsothemuseumstaffofmorethan1000long-termoccupationofofficespacetore-repair,then,the"openarea"willincreasefromthecurrent30%to70%.