Cai Lun (AD 50-121) Inventor of paper. An invention that truly changed the world. Cai Lun (Ts’ai Lun) was born in Guiyang during the Eastern Han Dynasty. After serving as a court eunuch from AD 75, he was given several promotions under the rule of Emperor He of Han. In AD 89, he was promoted … Continue reading Cai Lun Biography