载体就是能够载带信息、参与传播的物质 ,譬如声音、电波、纸张和网络等都可成为载体。载体最基本的要素就是载带信息（内容） ,这也就是载体存在的理由。自从西汉蔡伦改进造纸术以来 ,纸张作为内容载体已经有两千多年的历史。毫无疑问 ,纸张作为传统载体 ,对整个人类文明的存 Carrier is to carry information, to participate in the dissemination of material, such as sound, radio waves, paper and the Internet can become a carrier. Carrier The most basic element is carrying information (content), which is why the carrier exists. Since the Western Han Dynasty Cai Lun improved papermaking, paper as the content carrier has more than two thousand years of history. There is no doubt that paper as a traditional carrier of the preservation of the entire human civilization