In the same oxygen-free environment, why were those two hands and thunders able to explode successfully?

"Confined?" A flash of inspiration flashed in his mind, Xu Chen high-fived and said: "That's right! Those two hands and thunder have two layers of sealing measures, and when they were filled with gunpowder, they were not carried out under a vacuum, so it is impossible to go in without some oxygen!"

"And the principle of hand thunder is to ignite gunpowder in a closed environment, so as to produce a large amount of compressed gas, so as to burst open, there is so much oxygen in it is enough, but now, there is not even a little oxygen, it is really impossible to ignite!"

Yang Ziyun on the side saw Xu Chen muttering to himself for a while, and then lowered his head again, worried in his heart, so he tried to explain: "Do you still have this thing outside?"

Xu Chen didn't raise his head, and said, "Of course, there are many more outside, but I only brought two with me that day, and now they have already run out!"

"Then wait until you go back!Don't worry, I will protect you in this strange place!" Yang Ziyun said with a grin. ※%top※%point※%small※%say,www.

"Huh, strange place?" Xu Chen was stunned for a moment, a flash of inspiration flashed in his mind, and he clapped his hands and said: "That's right! Since a strange place can't work, then just change to a place similar to the outside world!"

"If you want to talk about similar places, if you want to find them in other places, it's hard to find them, but if you want to be in Biancheng...... Hehe, isn't there a big area in the east!"

Since he knew that the toxin was oxygen, Xu Chen had paid attention to the bags of so-called ruined city debris when he went to work during the day today.

The bag was obviously sealed by the people of the City Lord's Mansion with a secret method as Chen Dong said, Xu Chen could only take off the jade pendant secretly when he was resting, and after holding his breath, he held the bag and sniffed for a while, and found that the suffocation situation was indeed faintly relieved, so as to confirm that the things in the bag really had oxygen storage.

If this is the case, then there must be a high concentration of oxygen in that large remnant city, otherwise the City Lord's Mansion would not have to spend a lot of manpower and material resources to clean it up every year.

Thinking of this, Xu Chen had an idea!

"Let's go!"

As soon as he said go, Xu Chen quickly packed up all his things, wrapped a package, carried it on his shoulder, thought about it, and brought the hollow steel pipe with him, and then pulled Yang Ziyun and turned out directly from the window.

It's dinner time, and the Bianhe River is full of lantern-hung flower boats, and the sound of silk and bamboo orchestras and the laughter of men and women can be heard from the boats.

"Where are you going?" Yang Ziyun was held by his little hand, and her heart trembled again.

"You'll know when you get there!"

Xu Chen pulled Yang Ziyun and walked straight to the east along the root of the wall.

The Bianhe River began to bend to the north a few miles east of Yun Ye's courtyard, and the river became straight, which was naturally the sword mark cut by the sword of the first generation of the "Half City King".

This section of the Bianhe River, which goes straight to the north, can be regarded as prosperous in the years just after the great change, but now it has become a boundary river that divides the remnant city, and few people come. The boats that appeared outside Xu Chen's window would only turn around a few miles to the east, and would never sail lightly into this straight section of the river.

Xu Chen didn't go far before he found a wooden bridge on this straight section of the Bianhe River, a wooden bridge leading to the remnant city in the east.

Similar wooden bridges, there are two more on this section of the Bianhe River, maybe they were used to facilitate the people to travel, but now they are only for those who go to the remnant city to clean up the city lord's mansion masters to save some body.

"Follow me!" Xu Chen turned around and whispered to Yang Ziyun.

The perimeter of the wooden bridge was empty, and not far from the opposite bank was a formation belt more than three zhang deep to curb the spread of toxins in the remnant city.

There was no one around, let alone lights, and with the darkening sky, Xu Chen pulled Yang Ziyun and rushed to the wooden bridge after a while.

With light hands, the two of them quickly crossed the wooden bridge and reached the opposite bank.

Get close to the formation belt!

Xu Chen was a little nervous, and his other free hand shook the jade pendant on his chest hard, and said to himself: "Brother Yu Pei, whether you can go over or not depends on you!"

Xu Chen settled down, grabbed Yang Ziyun's hand tightly, relentlessly, and rushed forward!

After running briskly for a while, a faint ripple suddenly splashed in the void in front of Xu Chen, as if water droplets were falling onto the surface of the water, and there was not much movement!

After running forward with his eyes closed and running for a while, Xu Chen stopped, looked back behind him, and the scenery did not change for half a minute. But when he turned his head and looked straight ahead, he was greeted by devastation!

"This ...... Where is this?"

Yang Ziyun, who was pulled by Xu Chen behind her, kept her eyes open, just now she only felt a flower in front of her, but the originally empty environment was replaced by the ruins in front of her.

"This is the ruined city! We just passed through a formation, that's why we saw these real scenes!" Xu Chen replied.

"Really, you mean...... Could it be that these are the real faces of Biancheng?" Yang Ziyun was shocked.

"Uh...... I can't say that, it's just that the ruined city in front of me is polluted by oxygen, so it has become like this, as long as this area is contained, there will be no problems in the rest of Biancheng!" Xu Chen replied.

"Oh......"

After Xu Chen finished speaking, he began to look around, as if looking for something.

"What are you looking for?" asked Yang Ziyun.

"Uh...... I don't know, it's just that the appearance of oxygen shouldn't be gratuitous, not to mention that this remnant city has been around for 10,000 years, and instead of weakening, the area is getting bigger and bigger, which means that there must be something that can generate oxygen in this place......"

"Huh! Cactus!" Xu Chen looked around, and suddenly found a little green in a pile of gravel not far away.

Hurriedly ran over, Xu Chen really found a cactus ball the size of a fist in a piece of gravel!

"Sure enough!" Xu Chen was overjoyed.

The oxygen function of the cactus is also good in many plants, and it is even more rare that the cactus has very low requirements for the growth environment, as long as the seeds are blown off by the wind, even if they are buried in the sandy soil, they can easily take root and sprout, and after taking root, the root system is extremely developed, and it is not easy to remove.

There are two in one, and Xu Chen quickly found the second and third, and as the pace gradually traveled eastward, the cactus balls became more and more dense......

Just when Xu Chen and the others broke through the formation and entered the remnant city, Zhao Bancheng, who was still in the main hall and bowed his head to Xu Chen's drawings and pondered, was suddenly startled!

"Someone has broken into the ruined city! With such a slight formation fluctuation, it seems that he is still a master!"

The body moved, and the hall was empty!

As a great monk in the late Yuan Infant period, Zhao Bancheng's movements were not ordinarily fast, from north to south, almost separated by half of Biancheng, but Zhao Bancheng came in an instant.

After coming to the fluctuation of the formation, through the formation, Zhao Bancheng clearly saw Xu Chen and the others who were not far from inside.

"It's this kid again!" Zhao Bancheng was shocked!

In just two days, Zhao Bancheng was shocked by Xu Chen's guy again and again.

First the attitude outside Huirentang, then the healing of the girl who even found himself troubled, then the words on the dock that were pointed, and then the blacksmith left a painting in style similar to the original......

This qiē surprised Zhao Bancheng, but compared to what was in front of him, it was nothing!

He ...... Who the hell is he? Aren't you afraid of the toxins inside? Also, how did this kid break the formation? If I hadn't been sitting in the hall today, I'm afraid that such a slight movement might not be noticed!"

Xu Chen, who was in the remnant city, was busy looking for plants everywhere, and gradually walked deeper along the green vegetation belt on the ground.

"Damn! I can only go once!" Zhao Bancheng, who was outside the formation, said fiercely.

Saying that, stepping in, as the city lord of Biancheng, he himself is the hub of all the big arrays in the city, and entering the formation is like pushing open the door of his own house, which is much more clever than Xu Chen, a skilled "thief".

There was almost no fluctuation, and Zhao Bancheng integrated into the formation and leaned towards Xu Chen and the others stealthily.

The vegetation on the ground is becoming denser and denser, and there are more and more varieties, and Xu Chen's face is naturally becoming more and more happy.

It's just that Zhao Bancheng behind him is located in the ruined city, and his divine sense can't stretch out too far, and Xu Chen is facing away from him, so he didn't notice Xu Chen's happy expression at the moment.

The area of the remnant city is very large, and after 10,000 years of accumulation, even if it only spreads every year, it is already a large territory.

After walking eastward for a while, Xu Chen traced the dense vegetation, and the direction gradually deflected to the north.

"Damn, where is this stinky boy going?" As he gradually deepened, Zhao Bancheng behind him obviously felt some suppression.

Xu Chen continued to look down, not noticing that there was a ruined temple not far from the north that was a hundred zhang high.

"Wouldn't it, right? This kid is actually going to the Emperor's Palace?" Zhao Bancheng, who was following behind him incognito, saw Xu Chen continue to head down and head north, and couldn't help but say angrily in his heart: "Damn! I brought the aura bracelet if I knew it! Now that the aura in my body is depleted rapidly, I don't know how long it can last!"

The closer the remnant city is to the central area, the denser the toxins will be, if you don't wear an aura bracelet to form an aura shield, relying on your own aura to resist, the aura consumption rate will be extremely amazing!

This is Zhao Bancheng, if he changes others, I am afraid that if I persist here, my aura will be exhausted, and I won't even have enough time to turn back!

"No! The toxins in the Emperor's Hall are even more dense, if you rush in, I'm afraid you really won't be able to get out!" Zhao Bancheng walked for a while, feeling that the aura in his body was depleting faster and faster, so he could only give up helplessly.

Running back quickly, Zhao Bancheng untied the stealth technique, revealing his body, in this remnant city, the aura consumption of any spell is several times that of the outside, even Zhao Bancheng, without the support of the aura bracelet, does not dare to squander it at will.

When he looked up again, he saw that the figures of Xu Chen and the others were gradually disappearing into the hundred-zhang-high dilapidated hall......

"Why does this kid ignore the erosion of toxins?" Zhao Bancheng lowered his head and pondered, and after a while, Zhao Ran woke up in shock: "No! This kid obviously doesn't have aura on his body, how can he do what I can't do?"

He ...... He...... He can't be from the outside world, is he?" R527