What do you mean by sunrise in the east and rain in the west?

"Sunrise in the East and Rain in the West" means "Sunny in the East and Rain in the West". The famous poem "sunrise in the east, sunset in the west, sunny and sunny roads" is a pun, meaning that it is sunny even if there is no sunny day. Take the homonym of "sunshine" and "affection" for example, people's performance seems heartless but affectionate. From Liu Yuxi, a writer in the Tang Dynasty, Two Poems on Bamboo Branches.

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Since ancient times, people like to express their feelings by singing, which is either unilateral or between the two sides. This kind of singing is really subtle when I think of it. Unlike ordinary language, it needs proper atmosphere and proper handling, and it should take into account certain consequences; It can come out of thin air, swim gracefully, blink, suddenly far and near, specious; It's like the tentacles of the mood, testing each other, looking at each other, or retreating at the touch, or pestering each other.