"Base One, open the passage to space. Pen ~ Fun ~ Pavilion www.biquge.info"

Under Meng Yang's order, Base No. 1 branched out a taproot, which pierced straight downward, and the head of this taproot was like a drilling worm, with a drill bit that was constantly rotating at high speed.

The drill bit keeps going down, and along the way, whether it encounters dirt or rock, all the bit is ground up and drilled away. The space is not far from the surface, and the drill bit passes through several karst caves halfway through, and quickly penetrates the top of the space.

"Spawn the Cyst!"

The taproot that entered the underground space continued to extend downward, until it stopped at the bottom of the cave in the underground space, and the taproot began to change, and the end close to the ground spread out, like water overflowing the ground, unfolding into a carpet of organic matter, spreading to the entire underground cave group.

This organic carpet is composed of a large piece of connected together, similar to lichens, fungus plants, the target is the insect fungus blanket, during which there are not only material transport pipes, but also relatively independent roots, so that the fungus blanket can be firmly attached to the rock surface.

The roof of the cave is also undergoing similar changes, and the fungus blanket is also spreading along the roof of the cave, and small roots are generated on the floor stalls, constantly digging into the rock crevices of the cave roof, and hanging themselves firmly on the top of the cave.

The bottom of the cave and the roof of the cave spread out at the same time, like an infestation and a devouring thing, and they slowly but firmly gradually covered the entire cave.

Base One now produces tens of thousands of tons of organic matter per day, all of which is transported to the location of the base tree through a network of roots, and then transported into the cave group through the taproot that is deeply embedded in the underground space. This organic matter turned into carpets, turned into ceilings, and quickly occupied one underground cave after another.

Within a few days, Base No. 1 completely occupied the entire cave group with a fungus blanket, forming a huge cyst composed of a fungus blanket.

The outer wall of the cyst is a fungus blanket, and the inside is an empty karst cave space, and at this point, a completely enclosed huge space controlled by Base One has officially taken shape.

The space inside the cyst is completely sealed, insulating not only moisture but also gas, and the entry and exit of all substances is controlled by Base One.

"Meng Yang, what should I do next?" Xiao Budian asked.

"Reserve organic matter, which is completely insufficient right now."

Under Meng Yang's instructions, Base No. 1 transported all the acquired organic matter to the cyst for storage, and now the cyst is like a super large potato with a huge air sac.

With a precedent, Meng Yang copied according to this model.

The Sky Patrol Eagles that were cruising outside were all recalled, and when they landed, they would be given several Base Tree Seeds, which the Sky TSurvey Eagle took with them and flew quickly towards the underground space where they had been discovered.

One by one, the seeds of the base trees were planted, and the base trees broke through the ground and began to build their own root network underground, taking large areas of mountains and forests as their own.

In the southwestern mountains of the Great Yuan Empire, great changes took place quietly outside the human world, and patches of mountain forests were assimilated, and the vegetation of the entire mountain became the same organism.

The villagers of the mountain village did not know that they were living on a huge organism on which they farmed, harvested, grazed cattle and sheep, ate and slept......

They didn't know that the forage they cut back for their pigs and sheep every day came from the base tree, and the matsutake mushroom, bamboo, astragalus, and kudzu collected from the mountain also came from the base tree.

At their feet, a dense network of roots crisscrossed like blood vessels, and in the deeper layers of soil, thick pipes resembled urban pipe networks, in which water and nutrient solutions flowed incessantly.

One by one, the base trees grew and expanded silently, and large areas of plants were fused in, constantly storing organic matter for Mengyang.

In the underground space, huge cysts gradually mature, and a large amount of nutrients are injected into these cysts every day for storage.

While more than two dozen base trees are taking root and growing, Meng Yang is solving the problem of sunlight for these ecosystems.

The ecosphere must be able to achieve the self-circulation of oxygen, with the existing technology, either by photosynthetic reaction to produce oxygen, or by thermosynthetic reaction to produce oxygen.

Several underground cavities with geothermal resources can be considered for the use of the thermosynthetic reaction system, and the other cavities can only be considered for the use of the photosynthetic reaction system.

This must solve the problem of sunlight, the current known biolight intensity is not enough, and the light wave composition is quite different from sunlight, Meng Yang must find a light source that can replace sunlight, this light source is best able to emit light waves that are basically the same as the composition of sunlight.

It seems unrealistic to use biotechnology to solve the problem of sunlight, but with the current level of human science and technology, Meng Yang has found two solutions.

There is a company in Italy whose product is LED lamps that can produce artificial sunlight, which are said to be able to simulate sunlight perfectly, and the spectrum is basically the same as that of sunlight.

This kind of lamp is good, Meng Yang fell in love at first sight, but unfortunately looked at the price, he had to give up obediently, this kind of lamp is indeed sold in China, but it is almost 80,000 yuan a lamp, and it must be installed at home, because it requires unique installation technology.

Meng Yang roughly calculated, he now has more than 20 underground spaces, with a total capacity of almost 1,500 cubic kilometers, if such a huge volume is illuminated by this kind of LED light...... That's about 10 lighting projects in Kyoto City!

I can't afford to sell Meng Yang!

Another solution is the high-pressure xenon lamp, which produces light that is also close to sunlight, and the fidelity is not as good as that of LED lights, but in terms of cost, this kind of lamp is the most suitable.

The price of a lamp is about 200 yuan, and it is estimated that it will be cheaper if purchased in large quantities, although the cost is still very large, but it is not so huge that it is out of reach.

With the sunlight problem out of the way, the next step is to wait for the base tree to slowly accumulate enough nutrients until it is able to make the ecosystem function.

While waiting for the base tree to stock up on nutrients, Sky Survey Eagles and Explorers are given a new mission, and they are asked to collect DNA samples of various creatures while exploring the underground space of other parts of the Great Yuan Empire.

Animals and plants, terrestrial or aquatic, bacteria and insects are all collected, and once experiments on the ecological cycle system begin, these DNA will become materials and selectively added to the ecosystem.

Biosphere 2 failed so badly that Meng Yang wasn't sure how long it would take him to figure out a suitable composition of ecosystem species, but fortunately there were base trees, which provided great convenience for the simulated ecosystem.