This is a typical palindrome, and its characteristic is that it can be read sequentially or reversely.
Couplets mean foggy, and you can't see the distant peaks clearly; Water and sky are the same color, and Tianshui is connected. Xiamen Gulangyu yufupu is located in the middle of the sea. There are mountains and rivers on the island, with vast smoke and vast sky.
This is a palindrome depicting the scenery, one of the couplets in China and one of the important cultures in China. Couplets written in palindromes can be read backwards or directly. Not only does it have the same meaning, but it's also quite interesting.
Extended data:
There is a mountain in Henan called Jigong Mountain. There are two landscapes on the mountain: Jidu and Longyin. Someone made a pair of insightful palindromes:
Ji du shan shan chicken dou
Hidden dragons in the rocks of Long Yin
Ji Xiaolan, a great scholar, came up with a palindrome on the occasion of the famous Buddha Temple in JD.COM:
People have been to the Big Buddha Temple, which is bigger than others.
The first couplet means that people pass by the Great Buddha Temple. The second part is that the Buddha statues in the temple are bigger than people.
References:
Baidu encyclopedia-palindrome