"Red thin" refers to Begonia flowers. In fact, red thin is not a flower name, but an adjective. It comes from Li Qingzhao's "rumengling", which originally means that the red flowers wither. However, Li Qingzhao has a feeling because he thinks of the appearance of Begonia flowers at home after the rain. Therefore, people refer to "red thin" specifically as Begonia flowers.
Original content:
"Like a dream order - rain and wind last night"
Li Qingzhao [Song Dynasty]
Last night, the rain was sparse and the wind was sudden. A strong sleep could not eliminate the residual wine. Ask the roller shutter man, but the Begonia is still there. Do you know, do you know? It should be green, fat, red and thin.
Translation:
Although it rained sparsely last night, the wind kept blowing. I was still drunk after a deep sleep. Asked the maid who was rolling the curtain about the situation outside, she said that the Begonia flower was still the same as yesterday. Do you know? Do you know? This season should be lush green leaves and withered red flowers.
Introduction to poetry:
"Rumengling · rain and wind last night" is an early CI work by Li Qingzhao, a poetess of the Song Dynasty. This word is a description of asking about flowers after waking up, which euphemistically expresses the author's feeling of pity for flowers, fully reflects the author's love for nature and spring, and also reveals his inner depression.
Although the length of the whole word is short, it is implicit and meaningful. It sets off the feelings with the scenery, works hard, light and new. It depicts the psychological emotions of the characters vividly. It promotes the development of the meaning of the word with dialogue, ups and downs, and makes the most of the vivid beauty, showing the author's profound artistic skills. Later generations spoke highly of this word, especially the sentence "green, fat, red and thin", which was highly appreciated by scholars of all dynasties.