(1) Cai Lun's papermaking technology, raw materials are easily available and cheap, and the output and quality of paper are improved. The invention of "Cai Hou Paper" caused a revolution in writing materials, which made culture extremely popular, easy to spread and easy to use, and played a great role in promoting the development and spread of human civilization.

(2) Today, people advocate the use of recycled paper, which reflects people's scientific environmental awareness. At present, China's natural resources are limited, especially the shortage of forest resources, which is also conducive to the protection of the ecological environment.