"The elephant is invisible when the sound is loud" is a famous saying in Laozi, which represents a feature of classical aesthetics. The "big sound" and "elephant" mentioned here do not refer to specific sounds and images, but emphasize the natural and absolute artistic realm. Specifically, "great sound and great joy" means that the most beautiful music does not exist in a specific sound form, but those silent, immaterial and transcendent realms, that is, the artistic conception of music. Similarly, "elephant invisibility" means that the most beautiful images do not exist in concrete material forms, but those intangible, immaterial and beyond the reality, that is, the artistic realm. In other words, the expression of "the elephant is invisible" is a kind of artistic beauty beyond the material world, emphasizing intangible factors such as inspiration, artistic conception and charm in artistic creation. This thought had a profound influence on China's literature and art, and became an important aesthetic standard in traditional aesthetics.