Cite a few poets of the Tang Dynasty and talk about their poetic characteristics.

Li Bai, a bold and unrestrained romantic poet. The representative work is The Road to Shu is Difficult, Will Drinking

Du Fu, a realist poet, is melancholy and frustrated, and the representative work is Three Officials and Three Farewells

Bai Juyi is a realist poet, popular and clear, and the representative work is Song of Everlasting Sorrow, Pipa Song

Li Shangyin, affectionate and graceful, his representative work is untitled, brocade