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Therefore, the inscription of the space rune array is also a big project that does not allow mistakes.

Now, Han Xiao has completed these two tasks by himself, and he is methodical and precise step by step......

After doing these two steps, before I knew it, many days had passed.

Next, it's time for testing.

The magic weapon-level materials, combined with the space rune array to create a cave, are naturally also considered a magic weapon, so they can be controlled with spiritual power.

Han Xiao shrunk, folded, and enlarged the space...... This has been repeated many times, testing the performance of this small and small cave.

The most important thing is to see that the space inside it is stable and unstable when it shrinks and expands.

If the space is unstable, let alone putting people inside, even if it is not safe.

Fortunately, the level of Han Xiao's inscription space cave was accurate and quite superb, and after several tests, the space inside was very stable.

After passing the first test, Han Xiao started the second step of the test, the live animal test.

Of course, he wouldn't be stupid enough to use a living person to go in and test, Han Xiao asked Tang Jian to find someone to get some rabbits, goats and other animals, drive them into the cave, and then test them......

Han Xiao's test was very targeted, because there was a lesson from the past, and the tragedy of Fang Tianzheng's teacher Fu Chunyang was ahead.

He first put away the space cave, and then released it, and after repeating this several times, he observed the mental state of many small animals, and saw if there was any possibility of being suffocated to death.

The trial has been slowly deepening, and the time has been slowly lengthening......

Such a boring experiment made Tang Jian, Tang Xiaoxue, and Tang Xiaowu, who were very interested at the beginning, lose interest in watching it. Such a monotonous test makes people who watch it feel boring, and those who do it have a tendency to intensify.

Tested all the way, until a small animal died, and then Han Xiao gave up.

It took almost two months.

At this point, Han Xiao finally knew how long a living creature could stay in the cave without suffocating to death.

This time is about a day, and beyond this time, the air inside will be almost exhausted, and the living creatures inside will be suffocated to death.

As for the question of the laws of sunrise and sunset, which is related to the time and space of the universe, at present, it is not something that Han Xiao can know.

is really limited by the realm and strength, Zhuangzi has a good saying, Xia worm is not enough to talk about ice. If you don't have strength, realm, or wisdom, you won't be able to understand the laws of time and space in the universe.

It's just that, according to Han Xiao's theoretical speculation, if the Space Cave Mansion is released, then the laws of time and space will be the same as this realm. But if the closure is reduced, then it should be a small closed world of its own, and it is unknown how living people and living things will be affected in it.

The laws of heaven and earth and the universe, for him, are unknown realms after all, and they are also unknowable realms at present.

However, in the past two months, Han Xiao has not gained nothing.

Repeated experiments have taught him that living beings can stay in a separate spatial cave for a day without suffocating.

Therefore, the plan to bring Xiao Xue and Xiao Wu into the Spirit Sword Sect can be implemented.

In fact, the time of this day is not impossible to extend, and Han Xiao has a way to extend this time.

On Earth, for example, nuclear-powered submarines can dive in the sea for three or four months before resurfacing. It is used to produce oxygen, or to convert carbon dioxide into oxygen......

It wasn't that Han Xiao had no way to produce oxygen in the closed space cave, but there was really no need for that, because, one day was enough for Han Xiao to bring two living people into the Spirit Sword Sect and place them in his cave.

For some reason, Han Xiao had to carve a formation in advance that could isolate the detection of divine sense, so that after he returned, he could quickly arrange it in his room.