Someone asked, how long is life? This question has puzzled me for a long time. A person's life is neither long nor short. The next second, you may be alive or dead, happy or sad. You don't know what will happen in the next second, nor how long your happiness or sadness will last, nor how long your life will last.
Living in a big city, maybe you are just an ordinary star in the universe. In fact, people have met many people in this life, and perhaps, every time they meet, it may be the last time.
In those golden years, we made an appointment not to say goodbye.