蔡伦 (Cai Lun) was a Chinese eunuch and inventor who lived during the Eastern Han Dynasty. He is best known for his significant contribution to the invention of paper around 105 AD. By combining materials like tree bark, hemp, rags, and fishnets, he created a more efficient and practical writing surface, which greatly influenced communication and record-keeping in China and beyond. His innovation in papermaking led to the spread of literacy and education, making it easier for people to document information. The process he developed laid the foundation for modern paper production, and his legacy is celebrated in the history of Chinese culture and technology.