| COMMENTARY |
As time goes on, the earth environment is no longer suitable for human life, so humans begin to develop new strongholds in outer space. Kinds of spacecrafts leave for outer space. All these spacecrafts are automated driving. And they can meet all the needs of mankind. So the human can live on the spacecraft for a long time before they reach the next stop. Traveling among different planets or galaxies makes the communication of different interstellar cultures come true. Finally, there arises the Silk Road in outer space. |
