标准60字左右。I believe that everyone is all too familiar on paper, because the need to use every day. However, the one before us a clean slate, we all know, do and how is it made of? Today, when I was a little guide for everyone who introduced. According to legend, in BC 105 yuan, Cai Lun successfully invented papermaking, paper predecessors, he summed up the experience, through trial and error, with the bark, hemp, rags, old fishing nets and other materials through the down of ramming, copy, arch, etc. 72 craft, and finally made a practical fiber paper was called "Caihou paper." This kind of paper on the reform and promotion of papermaking have much to contribute.