We don't realize that letting go is also an important lesson in everyone's life. Nostalgia and regret are inevitable. Because who doesn't want to change the mistakes that happened in the past. As well as the youthful bustle of summer. Those warm, vibrant rays of sunshine cannot stay in one place forever and refuse to leave another place. No matter how many times people reach out and try to catch the sunbeam. If we keep holding on to a shadow forever, when will we be able to find our true happiness?