China is constantly strengthening itself militarily. In this sequence, it launched a spacecraft, which can be reusable experimental spacecraft. All this was done under a secret mission.

It was strictly forbidden to take photos of the spacecraft or any discussion on it. According to China's official news agency Xinhua, the spacecraft was sent to space from the Jiukuan Satellite Launch Center in China.

On its return, it will be seen how the craft can be used again. By the way, it is interesting to know what are the reusable spacecraft and what need did China have for it.

Reusable spacecraft means that the spacecraft is not useless after a single time, but can be used repeatedly at launch. Traditional spacecraft become unusable after a time. Like the initial aircraft used to be used only once. There is a special type of insulation sheet over the shuttle.

This sheet protects it from the heat generated by friction in the earth's orbit. Therefore, this sheet is preserved. If this sheet is not there or is broken due to any reason, the entire vehicle burns down in minutes.

In addition to the moon-stepping mission, all the spacecraft sent to collect planetary information are robot craft. They are automatically operated from the ground by computers and robots. 

After this, the idea of ​​reusable spacecraft was thought of. There is such a mechanism in it that it is able to move away from the axis and return to the earth's atmosphere again.

Like there is a similar arrangement in NASA's space shuttle. Space X Dragon also works in a similar way. They work in such a way that the spacecraft deorbit. This reduces its speed considerably and it starts descending. While returning to the earth, the temperature of the spacecraft does not increase much, for this, heat-shielding is done in it. 

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This shielding / evr layer is called multi-layer insulation. It is a kind of insulator made of many thin layers. It does not allow any external energy inside itself.

This protects the spacecraft from any thermal radiation. This multi-layer insulation is commonly known as gold plating. These layers, which look like bwms gold, are not gold, but they are a kind of plastic, which is called polyimide. With this, the temperature of the aircraft remains to a certain degree. 

Many other materials are also used for heat-shielding. Although they are not as reliable. In such a situation, there is a danger of the spacecraft being destroyed due to heat returning to the earth. The landing was first thought of for landing, but now in view of security, landings are being made in the sea rather than on land by parachute.

Once landed, it takes time to prepare the spacecraft for reuse. It can also go for about a year. However, how many times any craft can be used, it also has a capability. 

Now if we return to the report of Xinhua of China, then he writes that Jiuquan Satellite Launch Center has left this spacecraft but apart from this no information is available.

It is only said that it will return in due time and then it will be examined to be reusable and it will be prepared accordingly. According to Space News.com, it could be the same spacecraft that China had left in 2017. Even then he had talked about reusable technology and said that he is preparing for its launch in 2020. 

It is believed that China is showing this technology in competition with America. The US also built the X-37B spacecraft, which has been sent to space 4 times so far under the Air Force project. NASA's space shuttle program was also very successful.

Under this, 135 missions were successful from 1981 to 2011. The then Soviet Union (now Russia) also launched a program in the year 1988. The program to build this reusable spacecraft named Buran is now said to have stopped.