The world known as the Demon Realm in ancient times, now commonly referred to as the Parallel World, is currently quite dangerous.
It's not that the civilization development level of the Parallel World is particularly high. The main issue is that the world is now filled with radiation. If this world is forcibly merged into the current one, all that radiation will inevitably be integrated as well. Then, with just one misstep, one might not gain much benefit.
The world could face an apocalypse due to strong radiation.
This would lead to a survival crisis for humanity.
If this isn't dangerous, then what is?
Less than two hundred years after the Immortal-Demon War concluded over ten thousand years ago, a war broke out within the Parallel World, though the specific reason is now lost to history.
Regardless, it was a devastating war.
After the war, the high-level civilization of the Demon Realm was largely destroyed, and civilization entered a state of reset.
This means that after the destruction of a previous civilization, the surviving humans, due to a significant decline in technological civilization, entered a state of apocalyptic survival. Their overall civilization level continued to decline, eventually regressing to a relatively primitive, tribal-like state, which is called civilization reset.
It's akin to being told, "Young hero, please start over" in a game.
A core component of civilization development is population. Without sufficient population, a complete and comprehensive scientific and technological system cannot emerge. It's even impossible to support the existence of a complete technological system. Without a complete technological system, the overall technological level and civilization level will find it difficult to continuously improve.
It might even regress.
After the Battle of Yamen in the late Song Dynasty, tens of thousands of Southern Song remnants fled to a desolate island to survive. Within a century, they regressed from the highest civilization level of their time to a state barely better than some local indigenous peoples.
This was partly due to the incomplete technology they carried, and partly because a small population could not sustain an entire technological system.
High-precision technology is not developed overnight. Every piece of high-precision technology is inevitably supported by numerous mid-level technologies and basic industries. In the Parallel World, all mid-level technologies and basic industries had already been transformed into intelligent operations. After the war, this entire system essentially collapsed. Many individuals proficient in high-precision technology, deprived of the support of the corresponding basic systems and equipment, were rendered useless.
This led to a technological gap.
It was only natural for the civilization level to continuously regress.
What's remarkable is that the Parallel World managed to preserve the cultivation techniques they plundered from this side quite well. Later, as their descendants gradually adapted to the radiation, they even developed a peculiar radiation-based cultivation system that absorbed various forms of radiation energy.
However, regardless of the details, the Parallel World is a tricky issue.
A world full of radiation.
It's an absolute poison.
The beings in that Parallel World may have long since adapted to the radiation environment over the years, even developing corresponding cultivation systems. Their civilization has now re-evolved to the feudal society stage. However, the world Ding Yun currently inhabits is not suited to radiation.
If the two worlds were to truly merge.
People on this side would likely die in droves.
Tens of millions, even billions, would die.
Therefore, the best option is to ignore it. If it's ignored, it will take thousands, even tens of thousands, of years for these two worlds to completely merge.
By then, what business would it be of hers?
She would have long since gone to some other world.
To put it bluntly, whether the individuals, nations, and civilizations in the current world will still exist in a few thousand or tens of thousands of years is questionable.
They might have gone extinct.
So there's really no need to worry too much.
After thinking it through, Ding Yun abandoned the idea of killing two birds with one stone, which would have involved imprinting her own brand on the Parallel World as well. However, considering that the original host had always been thinking about her fiancé, Ding Yun decided that before she left, she had to help them fulfill their wish and reunite them.
The difficulty of this matter lay primarily in.
Whether to bring Xu Jun back from the Parallel World.
Or send the original host's soul there.
If Xu Jun wished to return, sending the original host's soul would reunite them, but it wouldn't be a perfect reunion. It would also require separating the original host from her parents. If he didn't want to come back, bringing him back might lead to him trying to find a way back, which would also be troublesome.
Thus, Ding Yun had to reluctantly act as an intermediary. Using her world authority, she contacted the original host, who was in the shattered secret realm within the sarira, and Xu Jun, who had begun to adapt to the radiation in the Parallel World.
Under the guise of the Public Security Department Headquarters.
She informed them of their respective situations and asked for their thoughts, stating that they only had one chance and should think carefully, as there were no second chances.
The original host did not want to leave her parents. At the same time, she hoped Xu Jun would choose to return, as it was better to be in a peaceful and prosperous country with both parents present, compared to a Parallel World that had just developed to the feudal society stage and was full of radiation.
However, if Xu Jun was unwilling.
She could reconsider.
Xu Jun, on the other hand, eagerly expressed his desire to return and asked if he could bring back a surviving junior brother. Not long after they entered the Parallel World, their mentor died of radiation. Among the remaining senior brothers and sisters, some mutated from radiation and committed suicide because they couldn't bear it, some died of radiation, and some miraculously adapted to the radiation but were not suited to feudal society.
Ultimately, they died for various reasons.
Only he and his junior brother Niu Xiao were lucky enough to dig a deep pit at their point of arrival and hide, relying on the supplies brought back by their senior brothers and sisters, venturing out rarely.
This allowed them to survive until now.
Although they were somewhat malnourished, they were at least not wanted criminals who were robbed and killed. Additionally, by frequently hiding in caves, they were exposed to relatively less radiation.
This is how they managed to survive in a relatively healthy state.
Since there was no conflict in their wishes, it was good news for Ding Yun, saving her the trouble of persuading them. However, just as Ding Yun was preparing to bring Xu Jun back.
He made another request, asking if he could bring back the bodies of his mentor and senior brothers and sisters, so that they could return to their homeland and be buried.
After all, bringing one was the same as bringing many. Moreover, even in death, Xu Jun's mentor and senior brothers and sisters bore the imprint of this Parallel World.
Finding them was not difficult.
So Ding Yun did not refuse. She simply used her world authority to locate and bring them back, and then transported them all back to their original location.
That is, the no-man's-land in Qu County where they disappeared.
After completing this task, Ding Yun contacted the Public Security Headquarters again, informed them of the situation, and reminded them to quickly send people to treat Xu Jun and the others for radiation. Then, she began to withdraw her own soul.
While doing so, she pulled the original host's soul out of the small secret realm, inserted it back into her body, and chose to return.