Upon closer examination, the real problems that could trouble Li Xingkong are only a few: oxygen, pressure, Fallout, and dealing with meteorite impacts.
These issues have different priorities. The pressure problem can be solved with a spacesuit, and Li Xingkong felt that given his physical strength, he might already be able to withstand the pressure in space.
The current solution to Fallout is to include a large number of lead plates in the spacesuit to block Fallout. Li Xingkong will definitely need to solve this problem, but it is quite difficult and may need to be postponed.
Among so many issues, a meteorite fall should be considered a low-probability event. Furthermore, the initial Guanghan City Plan location is still in a lunar cave, not directly exposed on the lunar surface. Even if a meteorite falls, there will be a place of refuge.
After some consideration, Li Xingkong decided to start with oxygen.
Humans need to breathe, inhaling oxygen and exhaling carbon dioxide. In this process, oxygen plays a role in the body's internal energy supply.
If Li Xingkong completes his Body Tempering and enters the subsequent cultivation stage, then the oxygen problem will naturally not need to be considered. After completing the Body Tempering, he will have entered the late stage of Qi Refining. The main task in the Late Qi Refining is to make corresponding adjustments to his internal organs.
After this adjustment, Qi Refining will gradually break free from the various limitations that restrict the human body, including oxygen, gravity, and the various necessities for long-term life on a planet, thus enabling them to truly take their first step into the universe.
For someone who doesn't understand cultivation, this step would already be considered ascension.
As for the jokes that circulated before, about cultivators ascending to the atmosphere only to find they suffocated due to lack of oxygen, that's just pure comedy.
Reaching this level, one's bodily functions and energy circulation far surpass those of ordinary people. If one still needs to rely on breathing to maintain the circulation of energy within the body, then let alone ascending to heaven, one would die of oxygen deprivation on Earth Star.
Otherwise, one would have to live in the hospital permanently, spending all day on oxygen.
Why don't we have giant creatures like those from the dinosaur era anymore? It's because the overall oxygen content on Earth Star has decreased. There was a period when Earth Star had extremely high oxygen levels, and back then, any insect could grow to several meters long.
However, Li Xingkong is not yet at that level, and the person who promised Old Tang to go to the moon is also not at that level, so we still need to find a way to deal with the oxygen issue.
Li Xingkong's main approach to dealing with oxygen was to learn from existing methods.
What is the most readily available reference point around you?
Of course, it's plants. Plants can absorb oxygen through aerobic respiration, and they can also absorb carbon dioxide and convert it into oxygen.
Moreover, the conversion efficiency is not low, and there may even be a surplus.
Nonsense, where would other organisms besides plants get the oxygen they need if there's no surplus?
Li Xingkong's ideas about oxygen came from these tiny plants.
His plan was to design a spell that would allow the human body to find a balance between these two transformations, keeping the amount of oxygen consumed and the amount of oxygen produced consistent. In this way, from an individual's perspective, their oxygen requirements would be reduced to a certain extent.
It can even survive for extended periods in oxygen-deficient environments without oxygen supplementation.
However, solving this step alone is far from enough. There is another problem in space: in a vacuum environment, as long as the human body interacts with the outer layer, the gas inside the body will inevitably escape.
After all, the pressure in a vacuum is much lower than inside the human body. In a vacuum environment, even if only one nostril is exposed, the gas inside the body will escape through the nose.
This is a law of physics, and no one can cure it.
Therefore, to solve the oxygen problem in space, a second step is needed.
The simplest way is to wear a spacesuit; it's a ready-made solution and has been proven in space multiple times.
But this went against Li Xingkong's wishes; what he wanted was to get rid of the constraints of the spacesuit. After all, it was too heavy, and even though the moon's gravity wasn't as strong as Earth's, its bulky design would still hinder movement.
Although he didn't want to accept the idea of wearing a spacesuit, the design concept was still worth considering.
That means finding something to cover yourself up.
As for what this thing is, Li Xingkong felt that there must be some kind of magic that could do it.
He can now use the Explosive Counter Spell to completely cover his body, but this covering is too tight. The armor material formed by the Explosive Counter Spell is mainly for protection against attacks, leaning towards hardness and sturdiness. If it really comes down to that, a spacesuit would be more convenient.
Therefore, what he was actually looking for was a spell similar to the Explosive Counter Spell, but one that generated a structure that was more form-fitting and made of materials that facilitated movement.
"System, retrieve relevant spell information."
Since the requirements were so clear, Li Xingkong didn't waste any more words and directly instructed the system to begin the search.
"Based on your idea, there are two spells you can refer to: the Water Repelling Art and the Breath Holding Spell."
The system transmitted the relevant spells, which Li Xingkong read through one by one.
The Water Repelling Art, as its name suggests, is a spell generally used underwater. It is usually learned by fishermen in the Qi Refining stage to make a living. After learning this spell, even humans can live underwater for a long time like fish.
Breath Holding Spell is also a production-related spell, mainly used by workers in various harsh environments, such as mines or production environments filled with toxic gases. It is used to isolate the surrounding environment and ensure safe production.
Although these two spells have different uses, they are actually quite similar.
The only difference is that Breath Holding Spell focuses more on isolation from the outside world, while Water Repelling Art focuses more on pressure regulation, since the pressure from water is a major problem when you go deep underwater.
These two spells each have their own focus, and the effect that Li Xingkong wants is exactly what these two spells focus on. It seems that he still needs to learn both spells, and after learning them, he can combine them to create a spell that perfectly suits his needs.
As for whether there are any spells that would allow ordinary people to live in a vacuum, the system's spell pool is bottomless, so perhaps there are.
But could he simply use the existing spells directly? Li Xingkong remained skeptical.
After all, his current situation is indeed very rare.
He was the only one with the highest cultivation level, at the Mid Qi Refining, and he only had one wisp of Spiritual Qi. This meant that all spells relying on Spiritual Qi couldn't function without him, instantly reducing his spell options by 99%.
If Spiritual Qi were plentiful, he wouldn't need to devise such a spell; he could simply use a large amount of Spiritual Qi to condense a shield, which would be far more convenient than painstakingly conceiving a spell.