The New Yuefu Movement and the Poetry Innovation Movement initiated by Tang Dynasty poets Bai Juyi and Yuan Zhen advocated restoring the collection system of ancient poems, carrying forward the tradition of satirizing current events and Yuefu in Han and Wei Dynasties in The Book of Songs, making poetry play the role of "sizing up the situation" and "releasing human feelings", and emphasizing self-creation of new Yuefu topics, hence the name. The so-called new Yuefu is relatively old.