What worries did Qin Guan's words express?

At the beginning of this song "Chitose", it is said that "the spring is cold and steep", suggesting that summer is coming; At the end of filming, he said, "Spring will pass," and he will come back tomorrow spring. There may be a little distance in time, but there is no difference in the poet's psychology. Cover the fourth-order metabolism, and retire if you succeed. At the peak of spring, sensitive poets will know that it will be replaced. The poet thinks of the past from now on, and the future from the past. He deeply feels that the road ahead is vast and life is unpredictable, and a great pain is gnawing at his heart, so he can't help but shout "Spring is gone and spring is coming, flying red like the sea". This not only means that the spring of nature is passing away, but also implies that the spring of life is gone forever. The phrase "flying red" is quite similar to the poem "A flower flies away, but it's spring, and the wind floats ten thousand points, making people sad" in Du Fu's Qujiang Dujiu. However, using the sea as a metaphor for sadness is a great creation of the author. From the whole article, this conclusion is also extremely powerful. Xia Runan (Sun Tong), a close friend, said: "This word is colored by the word' worry like the sea', which is called an epigram." (Quoted from Yu Biyun's Selected Interpretation of Song Ci).

This word expresses the author's grief and sadness caused by the disillusionment of political ideals with the image of spring passing and flowers falling. It's sad to read, and wonderful to sing. For reference.