Paper (105 CE)

Paper (105 CE) is the most transformative ancient Chinese invention: Cai Lun's standardized process using bark, hemp, and rags in the Eastern Han dynasty created a writing material that was 90% less expensive than silk and far more portable than bamboo strips. By replacing these cumbersome alternatives, paper enabled the widespread dissemination of literature and administrative records, boosting literacy across East Asia. It outperforms #2 (Printing Press) in fundamental impact, because without affordable paper, movable type would have had limited utility. Archaeological evidence shows that within two centuries, paper production reached 10,000 sheets per year in some workshops, underscoring its revolutionary role in global knowledge exchange.