After putting away the iron box, Zuo Dengfeng turned around and followed, and when he returned to the ground, the three of them immediately packed up and set off, this time moving directly to the northeast, and that direction could leave the desert faster.

Datou and Wan Xiaotang were very excited to complete the task, but Zuo Dengfeng did not have the slightest excitement, this is the easiest thing, and it is not surprising that it has been completed.

There were still dead bodies and beasts attacking and chasing along the way, but these were not an obstacle for the two cultivators who had survived the catastrophe, and the three of them searched for a small amount of clear water along the way, and quickly returned to Cairo Airport.

There were no accidents on the way back, and the plane landed safely at the airport in Zhengzhou in the middle of the night before the fuel tanks in the plane's four tanks ran out.

"You guys go back first, I have something to deal with." Zuo Dengfeng took a fuel truck to send the two to a town ten miles away from Ziyangguan.

"Zuo Zhenren, when are you coming back?" The big head asked.

"Tomorrow morning, you go first." Zuo Dengfeng waved his hand and said.

"Zuo Zhenren, you are careful in everything, we will go back first." Wan Xiaotang rushed to the left to say goodbye to the peak and then started the car.

Zuo Dengfeng watched the two leave, then grabbed a corpse and walked into a closed room on the side of the road, this is the body of a young woman, deeply poisoned, screaming and almost devouring people.

Zuo Dengfeng did not freeze it, but looked for ropes to tie his hands, and then took out the indium arsenide from the iron box in his arms and soaked it in water, he had to do a test to determine what the indium arsenide was used for.

The purple-robed Taoist once said that the three souls of these dead corpses were missing, but the big head said that the three souls and seven spirits of the dead corpses were complete, which was one of the reasons why he was suspicious. The second reason for his suspicion is that the black water in the underground pyramid lost its original corrosive properties after the nuclear war, which indicates that the virus developed by the Japanese has a certain neutralizing effect on indium arsenide. Combining these two points, Zuo Dengfeng had doubts about the true motives of the purple-robed Daoist for letting him find the three pieces of metal.

After a stick of incense, Zuo Dengfeng poured the arsenic-soaked water into the female corpse's mouth, and then took a few steps back to observe the female corpse's reaction.

After the water was poured in, the female corpse changed instantly, her red eyes gradually turned black and white, the canine teeth in her mouth quickly faded, the ten fingers of her hands tended to normal, and her complexion turned white.

"Help!" The female corpse looked around blankly and spoke in a low voice unconsciously.

Zuo Dengfeng frowned sharply when he saw this, judging from the female corpse's actions, it had lost its ability to see at night, and it was able to speak, which showed that it was no longer a dead corpse, but a living person.

Just as Zuo Dengfeng was frowning and groaning, the female corpse that had just gotten better suddenly began to spurt blood, and red blood spurted out sharply, and before Zuo Dengfeng could react, the female corpse had already fallen to the ground and was silent.

Zuo Dengfeng felt that the world was spinning at this time, and the test confirmed his guess that indium arsenide could treat dead bodies infected by the virus. The reason why it was not saved is that indium arsenide needs to be used in combination with other substances to be effective. In this way, it is shown that the purple-robed Daoist deceived him, and they searched for the three metals not to make a time machine, but to prepare an antidote to kill the virus, save the earth's environment and the people infected with the virus.

The huge change knocked him down in an instant, Zuo Dengfeng leaned against the corner of the wall and gasped for breath, the reason why he promised the purple-robed Taoist to find three pieces of metal was because the purple-robed Taoist promised him to send him back to the Republic of China period after the matter was completed, but now it seems that the purple-robed Taoist undoubtedly lied, Ziyangguan has no time machine at all, he will never go back to the Republic of China period, and he will never see Wu Xinyu again.

At this moment, Zuo Dengfeng did not have the anger of being deceived in his heart, there was just endless sadness, the two women in this world who really treated him had already left, and he only had less than half a year to live, and the Ziyang audience knew that he would not live long and even used him.

"I'm dying, how can they still bear to lie to me!" Zuo Dengfeng hugged Thirteen and cried bitterly. Hopes are dashed, and all hopes are lost.

The crying did not last long before he was interrupted by the corpse that heard the sound, Zuo Dengfeng stood up with tears, shook the corpses that rushed in into pieces, and then spun around and swept north, indium arsenide was found by him, he would not leave it to those who deceived him, he wanted to recapture indium arsenide and let people all over the world bury him.

While sweeping north, Zuo Dengfeng hid his breath, lifted his breath and flew wildly, and soon he saw the fuel truck driven by Datou and Wan Xiaotang.

After seeing the refueling truck, Zuo Dengfeng stopped, and he suddenly thought that Wan Xiaotang had said that indium arsenide was used in the field of lasers and aerospace, and Wan Xiaotang was a helper invited by Ziyang Guan from other places, and he had not been in contact with the Ziyang audience before, and her words were still credible, since she said that indium arsenide was used in the field of lasers and aerospace, it showed that indium arsenide could indeed be used to make time machines.

Thinking of this, Zuo Dengfeng didn't chase after him anymore, he wasn't sure whether the Ziyang audience was looking for indium arsenide to save people or to make a time machine, and he had to confirm it before he started.

Although a glimmer of hope resurfaced in his heart, Zuo Dengfeng did not think about it in a good place, the purple-robed Taoist cultivated profoundly, it was impossible for him not to see that the three souls and seven spirits of the dead corpse were still in his body, and the reason why the purple-robed Taoist lied was because he didn't want him to know that these people could still be saved, and in the final analysis, he didn't want him to be suspicious.

Shen Yin Liang Jiu Zuo Dengfeng took Thirteen to the city, and he wanted to find the library to determine the specific use of indium arsenide.

The city is still full of dead people, like hell, Zuo Dengfeng took the lead in finding the city map, found the library according to the map, found the relevant books at the fifth watch, and finally determined the use of indium arsenide, which is much more special than the commonly used silicon element, itself contains highly toxic, has a certain degree of radiation, due to the extreme difficulty of purification, there is only a small number of applications in the high-end aerospace and laser fields.

After consulting the relevant information, Zuo Dengfeng still couldn't determine the true motive of the Ziyang audience looking for this kind of metal, he still needed further confirmation, only by knowing what metal he needed to look for next could he deduce the real motive of the other party.

Frowning and thinking for a moment, Zuo Dengfeng put the books into the wooden box, and then looked for clear water in the city, which he prepared for the possible battle that followed, if the other party really deceived him, he would die and the jade would be burned.

In the early morning, Zuo Dengfeng returned to Ziyang Temple.

When the Ziyang audience saw him returning, they immediately came to greet him.

"Zuo Zhenren has worked hard, please enter the main hall to serve tea." The purple-robed Taoist smiled.

"No need, please tell me what I'm looking for next, and I'll go to the North Pole immediately." Zuo Dengfeng said calmly, he didn't deliberately change his expression, because he had always had a gloomy face.

"Don't be in a hurry, you have to rest for a few days, go up, and introduce my family to you." The purple-robed Taoist invited guests.

Hearing this, Zuo Dengfeng glanced up at the purple-robed Taoist, unloaded the wooden box and sat next to the gatehouse.

"You guys go up first and bring down the breakfast prepared for Zuo Zhenren." The purple-robed Taoist waved his hand at the people who came to greet him.

"Yu Zhangjiao, what's the next piece of metal?" Zuo Dengfeng asked.

"It should be black metal, a black meteorite to be exact." The purple-robed Taoist lit a cigarette and replied.

According to Wan Xiaotang, the indium arsenide previously sought was used in the field of lasers and aerospace, which corresponds to the acceleration theory of relativity, what is the main component of this black meteorite? Are there alternatives? Zuo Dengfeng asked. He moved Wan Xiaotang out so that the other party would not be suspicious, and asked if there was a substitute that was purely a smoke screen, and his main purpose was to determine the composition of the black meteorite.

"We don't know exactly what the meteorite contains." The purple-robed Taoist shook his head and replied.

"I don't know what it contains, how do you know what it's for?" Zuo Dengfeng frowned and asked.

"This matter is a long story, the national scientific expedition team once found a piece of wood in the North Pole, the material of this wood is very peculiar, scientists have conducted a detailed study of this piece of wood, and found that it is subject to some kind of strong radiation to produce physical changes, we deduce that there is this black meteorite near the island where it was previously located, this black meteorite contains materials that we must make particle accelerators, and we have identified several suspected sites according to satellite positioning." The purple-robed Taoist explained.

"Can I see the piece of wood?" Zuo Dengfeng took out the liquor and took a sip.

"The wood is not here, what we share is only information, I'll go get the information for you, you can sit in the room for a while." The purple-robed Taoist turned around and walked towards the east side.

Zuo Dengfeng did not enter the house, he had been sitting outside the gatehouse and waiting, although the purple-robed Taoist looked as usual, but there was still a vague place in his words, he had not said what element the meteorite he was looking for contained.

Zuo Dengfeng had been gulping down his drink, and at the same time stroking Thirteen's pale yellow fur, if the purple-robed Daoist couldn't give a reasonable explanation, he and Thirteen would be ready to die here today.

"Here's an analysis of that piece of wood." After a while, the purple-robed Taoist walked back with a few pages of paper.

Zuo Dengfeng took it and found that the report was a total of three pages, the first page was written about the appearance of the wood, Zuo Dengfeng took a general look, and found that the cross-sectional diameter of this piece of wood reached three meters, and the cross-sectional diameter was the width of the tree, that is to say, this piece of wood was previously cut from a giant tree, how could there be such a big tree in the North Pole.

The second and third pages are written about the results of the analysis, using chemical symbols, and Zuo Dengfeng quickly looked at it line by line, and found that one of the elements of the piece of wood, called indoleacetic acid, was more than 1,000 times higher than the normal value.

"I want to sleep for a while." Zuo Dengfeng returned the analysis report to the purple-robed Taoist, stood up and walked to the gatehouse with the wooden box.

The purple-robed Taoist immediately ordered someone to make room for him, Zuo Dengfeng closed the door and found the corresponding books from the wooden box to find them quickly, and after a while, he found the explanation of indoleacetic acid, which is also known as auxin, which can promote the rapid growth of plants.

At this moment, Zuo Dengfeng was convinced that the purple-robed Daoist did not make a time machine, and he was only looking for metal to save the current harsh environment and those who had been infected by the virus.

Zuo Dengfeng was completely angry, raised his hand to remove all the water in the wooden box, flowed around his body, gathered for backup, and at the same time shook the door and walked out slowly......