What are some unpopular but beautiful Chinese words?

There are many unpopular but beautiful poems, which can be divided into two types. One is that the poem itself is unpopular, but one or two of them are widely circulated. The second one is really cold. Write a few words that I find unpopular but beautiful, including the above two. "Pot Pool" Han Yu, the pool is bright and the sky is clear, just add a few bottles of water when patting the shore. Let's wait for the bright moon at night and see how many stars are swimming. The pool light is green, and the sky reflected in the pool is also green. Why? Because there is new water in the pool. Wait until late at night, when the bright moon disappears, to see how many stars can swim in this pool? There is also Su Shi's "Hang Xiang Zi Du Qi Li Se". A boat with one leaf is light, but two oars are startled. The sky is blue, the color is clear, the mountains and mountains are bright, as far as the river, and the waves are as flat as a mirror. Swimming fish, counting, appearing like running water from time to time; By the water, egret point, relax. The stream during the day is crystal clear; Dawn river, cold and frost; The stream next month is a bright crystal world. Hills on both sides of the strait, looking at the depth, picturesque; Seen from the route, the curve is tortuous, like a screen. Yan Guang smiled in vain this year and never really enjoyed the scenery of this beautiful place. The emperor and the hermit are now like a dream, leaving only an empty name. There are only distant mountains and mountains; White clouds in the mountains, wind changes; Xiao Shan Xiao, want to drop green. The word Su Dongpo should be regarded as relatively unpopular. As far as landscape writing is concerned, it is one of my favorites. Last winter, I traveled to Jiuzhaigou alone and saw two ducks swimming around on the calm water. This sentence popped up in my mind: the water is clear and the shadow is clear.