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Alongtimeago,thetextisengravedonthebones,orwrittenonbamboo,silk,Thesematerialshaveveryheavy,someareveryexpensive,andcausealotofinconveniencetothepeople.IntheperiodoftheWesternHanDynastytwothousandyearsago,somepeoplebegantousesomeofthemoreexpensiveplantThefabricofpaper,thepaperlooksveryrough,writingisstillveryconvenient.

ToTheEasternHanDynasty,therewasaeunuchnamedCaiLundecidedtolookforapaperpracticalforpeopleMethod.CaiLunoftenwenttotheriver,toobservethewomenwashsilkandsilkfloatingflocprocess.Hefoundtherestofthesilkafterbreakingawayoutofsilk,WillformathinlayeronthetableThings。

Somepeopleputittodryinthesun,topastethewindows,package,orisusedtowrite.Hetothepapermill,Toconsultthepapercraftsmen,GraduallyunderstandandmasterthebuildThebasicprocessofpaper.Inordertocreateaneconomicandpracticalpaper,CaiLunusedthebark,Bark,Rags,scrapfishingnetsandothercommonmaterials,brokenthem,madeofpaperpulp.

EverymonthCaiLuntest,test,getallthedirty,thepeoplearoundTheyregardhimasaneccentric,notwillingtoapproachhim.Buthedidn'tcareaboutthosestrangeeyes,accordingtoAnewmethodofhispaperintheold.

Heusedthemethodoffloatingfloc,withthematforthepulp,thepulpoutWillformathinlayerofthemat,drieditwaspaper.CaiLunsucceeded.Hemadethelowprice,easytocarryandthewritingofthepaper,theAgreatinventionwaslistedasoneofthefourgreatinventionsofancientchina.