Why is the fish still alive and well after thousands of years?

The fish was also used as a traditional symbol of good luck in the struggle of the ancestors against nature.

Theme is a Chinese word, pinyin tí cái, which refers to certain aspects of social life as writing materials, and also refers specifically to the material used by writers to express the thematic ideas of their works, which usually refers to those events or phenomena of life that have been centralized, selected, and refined into a work; and secondly, it refers to the topic of conversation.