The duty of Han Yuefu is to collect folk songs or poems of literati for music, so as to prepare for royal sacrifices or banquets. The poems it collected were later called "Yuefu Poetry" or "Yuefu Poetry" for short. Yuefu folk songs in Han Dynasty had a far-reaching influence on the healthy development of later poetry. This influence, of course, is first manifested in the inheritance of the realistic tradition, which is based on sadness and joy and is caused by events.