Lines 1-6:

This opening stanza of 6 lines is organized around a central image of the river-merchant and his wife as a child, confirmed by the first component of the central image: the picture of a little girl with her hair cut in bangs. (The mark of an adult woman in the ancient Chinese culture was elaborate arrangements of uncut long hair.)

Each line contributes to a clearer understanding of the central image of the children. The repetition in three separate lines of the verb "playing" to describe the little girl's activity at the front gate, as well as the little boy's presence on stilts and his circling around where she sits, emphasizes the natural, contented activity of children—almost as a part of the natural world referred to here by "flowers" and "blue plums."

This stanza establishes the presence of the "I" and the "you" in the world...