Half a month later, Zheng Chen took Guo Jia and them back to Yizhou, Yizhou has changed a lot, more than a year, there have been many high-rise buildings built, are being renovated, many factories have started, hydroelectric power stations have been built, and the population has increased a lot.

The exploration team that went out to look for oil had returned, and Zheng Chen asked Zheng Zhen to set off with more than 3,000 troops and hundreds of talents to extract oil and refine oil.

"Meridian, didn't you say that there is oil here too? Why go so far to refine? Guo Jia was very puzzled by Zheng Chen's willingness to seek near and far.

"I don't want the environment to be polluted, that's why they go so far to refine oil." Zheng Chen explained.

"It's not hard to change the environment a little with your abilities, right?" Xi Zhicai looked at Zheng Chen and asked.

"One or two is okay, I don't have that much time in the long run, and the oil reserves here are not large, so there is no need to develop the oil here." Zheng Chen said lightly.

"Have you found a research base for the future?" Guo Jia also felt that what Zheng Chen said made sense, and as their place of residence in the future, the environment should be paid attention to from the beginning.

"After finding it, our research base is built on Hainan Island, where the climate is good, and the winter is not so cold." The scientists who will be trained in the future and their families will definitely not be able to live with ordinary people, and Hainan Island is the most suitable place.

Not every scientist Zheng Chen will let them cultivate, and only scientists who have made outstanding contributions will provide resources for them to cultivate.

"Why not build it in Kunming, where the environment is better because of the spring all year round? As long as you say a word, no one dares to come close. Xi Zhicai asked again.

"I still prefer to ...... on the island"

"You're used to calling the island owner!"

"Maybe......"

After that, Zheng Chen and the others talked about some things, and after a day of rest, Zheng Chen went to the small world alone.

With Xiaoling's help, even if no one opened the entrance for him, Zheng Chen could accurately find the entrance, forcibly opened the portal of the small world, and the aura inside also leaked out.

"Fellow Daoist, I've been waiting for you for a long time......"

As soon as Zheng Chen entered the small world, the Xuanyuan clan appeared.

"You've been waiting for me near the entrance?" Zheng Chen felt that it was impossible for the Xuanyuan clan to appear so quickly, except for being near the entrance.

"Yes, I've been waiting for you here since half a year ago, but I didn't expect you to come here for so long, is it really so fun to be with those mortals?" Xuanyuan asked with interest.

"You think I'm playing? I don't think so. Zheng Chen shrugged his shoulders and said.

"It doesn't matter if you're playing or not, you... You ready? Xuanyuan didn't bother with the question of whether he was playing with it, and asked Zheng Chen with a light smile.

"Are you going to fight me? Why didn't you say yes directly? Zheng Chen asked suspiciously.

"Everything has to be prepared, you suddenly appeared, I wasn't ready, how could I do it directly." As soon as Xuanyuan's words fell, the entrance was completely closed.

"Come on...... Zheng Chen took a few steps back, and set up a posture to prepare for a duel like those chivalrous men on TV.

"I said that you won't be my opponent, we don't need to fight, I didn't want to duel with you when I came here, but I wanted to refine you......" Xuanyuan finished speaking and fought a few hands, and then the surrounding aura surged towards him......

"You don't just want to refine me, you want to refine all the creatures in the small world! You are really amazing, in order to improve your strength, you actually did such a cruel and inhumane thing? Zheng Chen didn't panic, and looked at Xuanyuan with an indifferent look.

"Only in this way can I soar, my longevity is approaching, if I don't break through again, I can only live for another hundred years, I want to wait for a few more decades before you appear, and then the world will be in chaos, attract more living beings, and collect the elixir outside.

The strength of these people in the small world, and then refining all of them, even if I can't soar, I can reach the peak of the Shattered Mirror, I can have endless longevity, and sooner or later I will be able to break through and ascend.

And your appearance made me advance my plan, and I will definitely be able to soar by refining you together. Xuanyuan said affirmatively.

"Then before you refine me, can you tell me all the origins of this small world?" Zheng Chen seemed to have seen it, but he just wanted to know some secrets before he died.

"Most of the things I told you before are true, but I provoked that big war, my qualifications were limited at the beginning, and it took hundreds of years of cultivation to reach the Jindan stage, and my longevity was about to run out, and the people in my family looked down on me and drove me out.

In the end, I just wanted to find a clean place to spend my last days, but I didn't expect to get an adventure, and accidentally fell into an abyss, and there was a corpse at the bottom of the abyss, and the corpse had a book of exercises on it.

It is a cultivation method that can improve the strength of the soul by refining the soul and change the qualifications, and it is also the practice that was called the first magic skill in ancient times, and the person who cultivated this magic skill was hunted down by the people of the whole world, and finally was seriously injured, and fell not long after coming to that abyss.

After I got this exercise, I directly transferred to cultivation, but it didn't take long for someone to find out, and then I took out the exercise and that person, and asked him to practice with me, as time went by, more and more people knew about it, after all, we have to slaughter a lot of living beings in our cultivation, and I have a heart, and I will make this exercise public to the world, so that more people can practice.

Those who have no hope of breaking through all choose to practice this exercise, whether it is the righteous path or the demon gate, there are people who cultivate, and in the end, the world is in chaos. Some righteous people united in order to destroy us, causing a world war, which was fought in the dark, and finally really broke through the world, and a void passage appeared, and a void storm poured out of the void channel, almost sweeping the entire world, and only a few hundred thousand people survived in the end.

There are only a few hundred thousand people left in the tens of billions of people, and most of the whole world has been destroyed, and the aura is also extremely thin, and the few great powers who survived used a small piece of world stone to open up this small world, and called all the surviving cultivators in, and all the cultivation exercises were also included, leaving only 100,000 ordinary people outside.

I was lucky enough to survive at the time, and found an opportunity to assassinate those seriously injured powerhouses and refine them; And got the method to control this small world, and then refined hundreds of thousands of people, because there was an accident at the last moment, it was counterattacked, and the realm stayed in the tribulation period............"