Who put forward the New Yuefu Movement and what are its three requirements?

It was a new Yuefu that Bai Juyi and Yuan Zhen advocated in the middle Tang Dynasty.

Poetry-centered poetry innovation movement advocates writing new poems on current affairs with new topics. Although it doesn't pay attention to harmony, it embodies the spirit and aesthetic style of Yuefu from a literary point of view, and it should be said that it is still a real Yuefu poem. In particular, Bai Juyi put forward that "articles are written in time, and songs and poems are written in things." Clearly put forward the poet's thinking and pursuit of the social function and value of poetry. In fact, before this, there were theories of "poetry expressing aspiration" and "poetry expressing emotion", while in The Analects of Confucius there was a theory of "arousing the view and resenting the group", in which "arousing" and "resenting" focused on the lyrical function of individual mind, while "observing" and "group" focused on the edifying function of poetry in group aesthetics. Bai Juyi obviously paid more attention to the latter, and Du Fu's poems he admired were even promoted to the history of poetry, especially the three officials and three parting reflected a very strong realistic color. It should be said that the new Yuefu movement embodies a more positive attitude towards WTO creation. On the contrary, if we blindly emphasize the expression of personal feelings, indulge in the singing of love, pursue rhetoric and pile up allusions, we may lose the educational significance of poetry and become a generation of Kunxi and a generation of Xiangxi, which will make us laugh and give generously.