When we are young, we don't know the cruelty of time and reality. We don't want to have it once, we must persist forever. For this, we can wait and give up. After growing up, I realized that ten thousand years and forever are such rude words in the long river of life. The present you gave up for ten thousand years can never go back. The person you want to protect for ten thousand years is no longer there. If I had known this, it would be better to treat that person well now, don't wait so long to cherish it, and don't let yourself have regrets that can't be repeated.