In many poems whose titles suggest that travel is their subject, it proves to be only a minor theme. An exception, however, is the series of poems which Tu Fu wrote during the journey in 759 from Chʻin-chou to Tʻung-ku and on to Chʻeng-tu. This long journey carried out in a short period over strange and extremely difficult terrain powerfully engaged the poet's mind and moved him to commemorate it in a continuing series of immediate impressions. Read together, these poems may be seen as a poetical yu-chi. There are more than twenty poems in all. With the exception of the first, the following come from the second stage from Tʻung-ku to Chʻeng-tu.