Compass,gunpowder,papermakingskillandtypography,isChinaancientfourinventions,itisoneofthesignsthatChinabecometotheancientcivilizedcountry,occupytheimportantpositioninthehistoryofhumancivilization.

　　罗盘、火药、造纸术和印刷术,是中国古代四大发明,这是中国成为这古老文明的国家,占据在人类文明史上占有重要地位的标志之一.

　　DuringtheEasternHanDynastypalaceeunuchdirectorCaiLunworkshops,summeduptheexperienceofforefathers,begantoimprovepapermakingtechnology.Withbark,hemphead,rag,soakedinwater,afterchopping,cookingpulp,andthenfilteredwater,flattodry,producingthefamousCaiHoupaper.Thispaperthin,toughness,highdurability,easywriting,canbemassproduction.

　　东汉时,宦官蔡伦主管皇宫中的手工作坊时,总结了前人的经验,开始改进造纸的技术.用树皮、麻头、破布等,在水中浸泡后,经切碎、蒸煮制成浆,再滤去水分,压平晾干,制造出著名的蔡侯纸.这种纸轻薄、有韧性,价廉耐用,易于书写,可以批量生产.

　　CaiLunoftheinventionofpapermakingandperfectingprocess,madeenormouscontribution,waslaterreveredasthepaper'sfounder.Theinventionofpapermaking,isoneoftheearliesteffectsofhumanknowledgepropagationlearningrevolution,andourcivilizationbegantowriteonthepaper.

　　蔡伦在造纸术的发明和完善的过程中,做出了巨大贡献,被后人尊为造纸的祖师.造纸术的发明,是最早影响人类知识传播的学习的革命,从此我们的文明开始写在纸上.