In which dynasty did Yuefu poetry flourish?

Yuefu poetry flourished in the Southern and Northern Dynasties. Folk songs of Yuefu in the Southern Dynasties were collected and preserved by Yuefu organs at that time. They were mainly produced in the Eastern Jin Dynasty, the Song Dynasty, the Qi Dynasty and the Liang Dynasty, and were mainly preserved in Guo Maoqian's Yuefu poems, with "Wu Shengge" and "Western Quge" as the main ones in the Qing Dynasty, with Xizhou as the representative. There are more than 60 Yuefu folk songs in the Northern Dynasties, such as Chile Song and Mulan Poetry.