In the vast universe, the birth and death of a galaxy is but a fleeting moment of light. Looking up at the stars, there is always a sense of sadness that the ending is already predetermined. Where will you and I be after a thousand years? The homeland, the spark of civilization, Earth, are nothing more than a speck of dust in the deep space. A moment in the starry sky, a thousand years on Earth. The life of a creature is but a season, and we are all striving to cross over. What lies at the end of the deep space?