Palace lanterns are bright at night, China is prosperous, and * * * is happy all his life. How to explain the meaning of this sentence

My friend told me that if I visit in the spring rain season, I will see the lake surge. When the dam and sluice are opened, the green lake will rush down, leak into the canyon and fly into thousands of water droplets, forming huge fog and steam rushing to the valley, as if a huge silver chain floated down from nine days and instantly turned into countless colorful pearls. ...