19 19, the may 4th movement broke out. It held high the banner of "democracy" and "science", swept away all feudal ideology, completely destroyed the long-term sacred ruling position of feudal literature, and began to create "literature for the people", "literature for the people" and "literature for life", which showed that literature must be harmonious. During this period, a large number of literary youths were produced, who were influenced by the literary trend at this time and created from different angles. At this time, Bing Xin, who is studying in the university, actively participates in the student movement on the one hand, and eagerly reads a large number of works advocating "personality liberation" and "for life" on the other hand, recording her feelings, thoughts and memories at any time. From Birds, Bing Xin was inspired by the poetic short poems of the three richest men, which made her think of her mixed feelings in a few words, so she set about sorting out and making short Song poems.