It has the same meaning as a straight, but it writes more. People don't often say that the wind is right, but that it is smooth, which is one of them. Second, you try to read. When things are smooth, there is no smoke without fire. This is the rhythm that poetry must pay attention to. Just like why an ancient poem didn't say there were tall buildings in the southwest, but said there were tall buildings in the northwest. If you try to read it, you will know that the word southwest is awkward and the northwest syllable is not fluent. Poetry always gives consideration to meaning, level and rhythm, and is used well and vividly.
Therefore, in the sense of the whole poem, orthography will not change much, but it is not as good as orthography.
Maybe I didn't describe it clearly, but in any case, I can't get rid of this two-tier relationship!