Man is full of curiosity about all unknown things. Driven by curiosity, human beings first came into contact with outer space. After the United States successfully landed on the moon for the first time, other countries began to send astronauts into outer space, even China was no exception. The purpose is to land in outer space first. When it comes to China astronauts, we have to mention Yang Liwei, the first astronaut in China. He witnessed the step-by-step development of China's space technology, but who knows what happened after Yang Liwei landed in outer space?

Hear a knock at the door in space?

Yang Liwei is ahead of others both technically and physically. Apart from these two aspects, the most important thing is psychology. Because he is the first astronaut to land in outer space, we can't know what threat he will encounter after landing in outer space. Even so, Yang Liwei entered outer space with all kinds of confidence. He resolutely entered outer space in the face of unknown dangers, but many people didn't know that after entering outer space, Yang Liwei heard a mysterious knock on the door, which made everyone feel terrible.

After seeing this problem, our brains will be whimsical and start to guess who is outside the space station, and we will think of many mysterious things. Some people even think of Star Wars and so on. In fact, this speculation is not unreasonable, because no one can know what secrets are hidden in the universe, but it seems a bit unreasonable for aliens to knock at the door.

Aliens communicate with humans?

Most people speculate that it has nothing to do with aliens, but that meteorite fragments in the universe hit the space capsule, and so on. Then, in order not to make everyone think, the scientist told the real answer behind it. It is not our ideal alien, but because the spaceship is under external pressure, it makes a noise, which is very similar to the knock on the door in our daily life. If Yang Liwei hadn't made any response at that time, many unknown accidents would have happened, and of course there were dangerous astronauts in space.

1970, Apollo 13 exploded in space, and three astronauts went into outer space by space shuttle. An ordinary inspection blew up the oxygen cabin of the plane, and the three astronauts returned to earth with firm confidence in order to survive. This experience became a nightmare for the three of them. We have to sigh Yang Liwei's wit. If he doesn't respond in time, the consequences will be unimaginable.

Generally speaking, people who can enter outer space are by no means ordinary people. They went through all kinds of hardships before going into space. The success of going into space has strengthened our determination to develop space technology. I believe that with everyone's efforts, China will get better and better.