As the representative author of the「City Poetry」in 1980s, Song Lin's poems are poorly known since he went abroad in the early 1990s. In the exotic situation, with the training of internal dialogue and the concentration on writing, he has transferred the situation of exile into roaming in his poems, and consequently came into the poetics of vision, in order to explore the possibility of poetry writing in abroad. He also suggests that「the rhyme is the old garden of memory」, so that the various forms of memory could be set and sketched in the rhyme built by words and he integrates the audio elements into the poetics of vision. In order to achieve his poetic idea, Song Lin calls for 「digging」toward the root of words, and focuses his attention on the source of Chinese civilization.