In the next five hours, the rover went to three other designated locations to take different samples and install instruments, and then returned to the lunar module to rest. At the same time, Daqian Tang Taizong also launched the solar sail to recharge.

But the live broadcast of the moon landing is over. Although there are several days to go, the solar system technology exploration company announced that all future trips will not be broadcast.

Obviously, Daqian or Huaxia has more confidential experiments to do. If the live broadcast is on, it is likely to reveal clues, so they simply give up the live broadcast.

This has made countless intelligence agencies around the world busy and desperate to find out what Daqian did on the moon.

So what did Daqian do on the moon?

Well, some things are hard to say, so I won't say it here. Anyway, it's enough for some forces at home and abroad to drink a pot of things.

However, one thing must be said, that is, Jia Changtian left a Guanghan Palace on the surface of the moon.

Yes, literally, Jia Changtian and his team spent eight hours building a palace on the surface of the moon, called Guanghan palace.

Of course, the palace is just boasting. In fact, it can be understood as a large inflatable shed. After it is fully unfolded, the area is about 10 square meters, which is fixed in a place on the moon with average changes day and night.

Because this place is far from the landing point, it is difficult to reach without the transportation of the lunar rover.

So what's in the Guanghan palace?

Very simple, a small biosphere.

Everyone must have heard of the ecological bottle, which is to put some small animals and plants into a glass bottle for self-sufficiency. Without adding any food or opening the bottle, organisms can survive. This is the ecological bottle.

It's sold on Taobao. The price is very cheap. You can buy it for tens of dollars, but the ecology inside will collapse in about half a year to a year. After all, the smaller the volume, the more fragile the whole ecology is.

Moreover, there can be no living animals in the ecological bottle. At most, there are some microorganisms.

In addition, some people on earth have done similar experiments to build a larger ecosystem, isolate people outside the circle from all things, and people inside only rely on things inside to see how long they can last.

In the 1990s, the Americans established an artificial ecological cycle system in a desert in Arizona, named Biosphere 2.

However, please note that the reason why he is called No. 2 is not that he built No. 1 before, but that No. 1 is the earth itself. They built No. 2 earth. It can be seen how ambitious the builders of this experiment are!

The whole biosphere construction took 8 years, covering an area of 12000 square meters and costing us $150 million. It has more than 3000 kinds of animals and plants and more than 1000 kinds of microorganisms from all regions of the world.

After careful calculation and research, researchers believe that as long as these things are reasonably arranged and their quantity and size are designed, they can form a complete self-sufficient ecosystem, so that human beings can live in this ecosystem even if they leave the earth and rely only on sunlight.

According to the experimenter's plan, the ecosystem can last at least 10 years.

However, the first entry lasted only 21 months, oxygen and nitrogen dioxide were completely unbalanced, and all researchers had to quit.

They put forward improvement suggestions, transformed the ecosystem, and entered for the second time. As a result, they retreated after only nine months, and their results were not as good as the first time. Even many people involved in the experiment had different mental problems.

Therefore, many scientists assert that it is almost impossible to build an ecosystem artificially.

But this is what humans must do, because in the future, if humans want to leave the earth, they must build an ecosystem that can basically survive only by relying on sunlight. Otherwise, it is difficult for humans to survive on the surface of other planets and in long-distance colonial fleets.

After all, it takes thousands of years to reach the nearest planet that may be suitable for human habitation. If there is no perfect ecosystem during this period, it is impossible.

In addition, Jia Changtian's goal is to land on Mars. He also wants to build a scientific research base on Mars, which requires a complete ecosystem.

So the biological experts of Daqian laboratory took five years to create another ecosystem system, that is, the Guanghan palace arranged by Jia Changtian and them.

The ecosystem is only 10 square meters in size and consists of completely sealed transparent plastic. It is filled with a designed gas mixed with carbon dioxide and oxygen. The proportion of oxygen is slightly higher than that of the earth's air.

However, it is optimistic that this ecosystem can last for more than 10 years.

In addition, there are only more than 500 kinds of animals, plants and microorganisms in it. The largest creatures are two turtles. These two turtles are small turtles that grow very slowly. They don't eat much and grow slowly. They may grow to the size of their palms in 10 years. They are the animals most likely to live in this ecosystem.

At this time, they are still leisurely living in Guanghan palace. They don't know that they are the first pair of turtles living on the moon in the world.

I don't know if there are rabbits on the moon, but there must be turtles now. I just don't know how long they can live on the moon.

It's just groundless. We need evidence. If we test on earth, it will inevitably be dark under the lights. Therefore, Jia Changtian decided to move the Guanghan palace system directly to the moon.

If this Guanghan palace can really last for 10 years on the moon, mankind will be able to build a larger Guanghan Palace on other planets that can maintain human survival.

At the same time, a complete monitoring system and an information transmission system are installed in the ecosystem. At the same time, Jia Changtian will leave all the batteries of Daqian Tang Taizong to the ecosystem for use by these systems, so that the data inside the ecosystem can be transmitted back in real time to the earth's Laboratory for analysis.

This is one of Daqian's most important experiments on the moon. It is conceivable that once the news of this experiment is released, how many people will try their best to get relevant experimental data. After all, this is the main technology related to human migration to outer space and other planets in the future, so it must be kept confidential.

In addition, there are some other experiments of Daqian technology center, which have been done in the past few days.

In the blink of an eye, it was almost time to go home. On that day, Jia Changtian and Wang Jiawei drove Daqian Tang Taizong to collect data at the last place.

Suddenly, Wang Jiawei turned around and found that he had lost Jia Changtian.

At the beginning, Wang Jiawei didn't think so. After all, there are many situations in space where his teammates can't be seen suddenly. They have appeared before, and Jia Changtian soon appeared himself.

However, after more than 20 minutes, he still didn't find Jia Changtian. Wang Jiawei was a little anxious and dialed Jia Changtian's communication. As a result, there was no answer, indicating that he couldn't find the other party's signal.

"Shit!" for a moment, Wang Jiawei was sweating. He remembered the accident they had happened when they landed on the surface of the moon, and lost all contact in a moment.