Across the wall of Sanqin, across a layer of fog, across a river.
We said goodbye sadly, and our two officials went in opposite directions (well).
However, as long as China keeps our friendship, heaven will remain our neighbor.
If you don't do anything wrong, the child will touch the towel (now).
(1) Rhyme requires every even sentence to rhyme. The first sentence can be put on or off, and the rhyme will last until the end, and there is no rhyme change. In the past, in the enlightenment of children's poetry, the popular "135 is not divided, and 246 is clear" means this.
(2) The second rhyme of this metrical poem is "en", which seems not so consistent with the rhyme of the whole poem. While China is a vast country, the pronunciation differences between in and en in many dialects are not so obvious, but they still rhyme.
(3) In addition, when poets are chanting poems, they all feel something at the moment. In a flash of light, there are occasional odd sentences that don't rhyme, which makes a good artistic conception more unrestricted by rhyme. In A Dream of Red Mansions, Lin Daiyu instructed Xiangling to learn to write poetry. There is such a discussion about the rhythm of poetry, which is actually the master Cao Xueqin's own opinion.