Later, the word "ivory tower" was gradually applied to all aspects of social life, mainly referring to "an isolated fantasy, a paradise to escape from real life, and an isolated place". In Chinese, the ivory tower originally refers to ignoring the ugly and miserable life of the real society and engaging in writing in its ideal and happy situation, which means escaping from the real society, staying away from life, hiding in a lonely and comfortable personal world and engaging in writing activities with subjective fantasies; The extended meaning is mainly "a metaphor for the small world of writers and artists who are divorced from real life" Universities and research institutes are such places. Zhou Zuoren used the metaphor of a scholar who lives in a high tower. It may be influenced by Chuchuan Baicun's Out of the Ivory Tower.