 Du Fu 's work is notable above all for its range . Chinese critics traditionally used the term <unk> ( <unk> " complete <unk> " ) , a reference to <unk> ' description of <unk> . Yuan <unk> was the first to note the breadth of Du Fu 's achievement , writing in <unk> that his predecessor , " united in his work traits which previous men had displayed only singly " . He mastered all the forms of Chinese poetry : Chou says that in every form he " either made outstanding advances or contributed outstanding examples " . Furthermore , his poems use a wide range of registers , from the direct and <unk> to the <unk> and self @-@ consciously literary . This variety is <unk> even within individual works : Owen identifies the , " rapid stylistic and thematic shifts " in poems which enable the poet to represent different <unk> of a situation , while Chou uses the term " juxtaposition " as the major analytical tool in her work . Du Fu is noted for having written more on <unk> and painting than any other writer of his time . He wrote eighteen poems on painting alone , more than any other Tang poet . Du Fu 's seemingly negative commentary on the prized horse paintings of Han <unk> <unk> a controversy that has persisted to the present day . 
