《太平广记·卷二百零六·书一》
到汉和帝时，蔡伦改进了造纸的技术，此后制出的纸更适于书写了。
至和帝时，蔡伦工为之，而子邑尤得其妙。
During the reign of Emperor He of the Han, Cai Lun improved papermaking techniques, and the paper produced afterwards was more suitable for writing.