The aliens sent a message to the earth to "send 12 people." The aliens did not show up from beginning to end, nor did they explain why, nor did they explain the requirements of the 12 people they sent. We people on earth have to use different criteria and different methods to select 12 candidates again and again. Because we were unprepared, each selection process was like a ridiculous farce. The 12 people selected each time were returned during the transmission process. It seemed that no one could meet the aliens' requirements. However, people seemed to feel the impact and significance of the event on themselves. Suddenly one day, a "white arc" appeared in the space near the earth. We couldn't understand what it was and what it was going to do. Only a few people understood the strangeness - it turned out that to aliens, everything we had done before was meaningless.
