伦

Cai Lun（?～121）, courtesy name Jingzhong, was a Chinese eunuch. He was born in Guiyang（modern day Leiyang, Hunan）during the Eastern Han Dynasty. After castration followed by serving as a court eunuch from AD 75, he was given several promotions under the rule of Emperor He of Han. Around AD 89, Cai Lun was promoted to the position of Regular Palace Attendant（中常侍）,with the title of Shang Fang Ling（尚方令）, an official in charge of manufacturing imperial court goods. In 105 AD, with the help of Queen Deng, Cai improved on paper-making, mastering the use of bark, cloth, hemp, fishing nets and other raw materials paper. It makes our life more colorful. Though tools and machinery of papermaking in modern times may be more complex, they still employ the ancient technique of felted sheets of fiber suspended in water, draining of the water, and then drying into a thin matted sheet. For this invention, Cai would be world-renowned posthumously, and even in his own time he was given recognition for his invention.