"The water in the East China Sea is gone forever, and the sunset is still visible" means that no matter where the water flows, whether it evaporates or flows, it will eventually gather in the sea; Even if the sun goes down, it will still rise the next day, so do something while the sun is still in the sky. This sentence comes from "Augmented Xianwen", and the whole sentence is "painting water without wind is a wave, although embroidery is not fragrant; The poor should not neglect each other, and they should be rich if they are poor; Water flows to the East China Sea, never looking back, missing youth, full of worries; Sunrise in the East China Sea and sunset in the West Mountain are also a day of sorrow and joy. "