"Toubi Collection" records biographical history in the form of seven-character poems, with profound content, which not only expands the subject range of seven-character poems, but also makes great achievements in artistic techniques. In the creation of images, the characteristics of a series of images are highlighted. This poem embodies three image series: the poet himself, the restored army and the eternal emperor. In the poet's self series, the author describes his self-image and his complex and rich inner world from two aspects. Structurally, the couplet poem requires "harmony and observation, and the couplet is like a chapter; From a perspective, each chapter is self-contained, and it has its own orderly order. " In order to make the structure of the through-wall set tight, various technologies are adopted, among which vertical and horizontal crossing is adopted. The rhyme of Toubi Ji is second only to Du Fu's Eight Poems in Autumn. From a vertical perspective, it is a thirteen-fold poem with eight poems as the unit; Arranged in thirteen stacks, there are eight groups of rhyming poems with thirteen poems in each group. In this way, through the use of rhyme, each stack has a poem, repeatedly applying for an image, giving things to express feelings, and writing with rhyme. Thirteen stacks of poems have a set of artistic conception, and a rhyme has a feeling of rhyme. Therefore, although "Toubi Collection" is the largest group of poems in the seven-tone poetic style, it is still large, comprehensive, rich and orderly, which embodies the rare grand ceremony and beautiful aesthetic power in the history of poetry.