North and South was published by Modern China in 1939. The work used the life and characters of the northern Chinese cities in the 1920s as the theme to describe the conflicts and contradictions of a group of ordinary people in politics, economy, culture, etc., reflecting the impact of social changes on people's thoughts, emotions, and behaviors. The work was set in Tianjin, Beijing, and Haerbin, and through telling the stories of three families, it showed the various faces of Chinese society at that time. The protagonist of the novel, Ma Liqun, was an ordinary worker. His family took turns living in three cities and experienced different setbacks and difficulties. Through the life experiences of him and his family, Lao She portrayed a real and touching character, showing the suffering and struggle of ordinary people in Chinese society at that time. The novel was hailed as a classic in modern Chinese literature and had a profound impact on the development of modern Chinese literature.