I know rivers in class reading: I know rivers as old as the world and older than the blood flowing in human veins.

1. The "river" in poetry is a highly concise image. Can be understood as a symbol of history. Black people go up the river, which is a trace of their own history, their ancestors and their homeland, and a tribute to the outstanding contributions made by black people.

2. "My soul has become as deep as a river" can be understood as black people's witness to the "river" (history), and the achievements of human civilization and culture are accumulated in the black people's "soul". This poem is a proud declaration issued by the author on behalf of all blacks: blacks are a race with a long tradition. This poem appeared twice in the poem, forming a structural echo. (The above meaning is correct)