Research on National Culture and Cross-cultural Communication Based on Audiovisual Symbols Taking CCTV Documentary, "A Bite of China" as an Example

"A Bite of China", the documentary combines culture and food perfectly, and presents them with audiovisual symbols, which has achieved great repercussions in China and foreign countries. The concrete and intuitive audiovisual feeling not only stimulates the taste bud of the audience, but also shocks the soul. Each nation has its own cultural origin and dietary characteristics, and has a long history. Diet is also an intuitive manifestation of national culture. From the perspective of figurative audiovisual symbols, this paper takes the CCTV documentary "A Bite of China" as an example to analyze the cultural representation of the Chinese nation in gourmet food, discusses how to express it by audiovisual means, and explores the cross-cultural communication of national