"Who are they?" Dana said, scratching her head.

"From their approach," Lao Sha thought for a long time, "it may be a secret sect."

Everyone looked at Lao Sha.

Lao Sha looked at the tomb guardians, "Your duty is to protect the tombs, and the opponent is tomb robbers, such as Faqiu. I think my master may be a Faqiu. But there is another force that has always been against you, that is, the sect that suppresses the tombs. I have heard of this sect called Xiling. They do not steal the tombs, but specifically destroy the Feng Shui of the tombs. The sect like Xiling dug many Yuan Dynasty tombs and cut off the Feng Shui of the Mongols, so they were regarded as enemies by the Mongols, resulting in the sect being killed by the Yuan Dynasty army. Everyone thought they had disappeared, but by the end of the Qing Dynasty, after the Manchus allowed the Han people to enter the pass, the remaining sects of the Xiling sect may have migrated into the pass and immigrated the dragon veins of the Manchus and obtained the wealth of the Manchus' dragon veins. From then on, the power increased greatly, but their actions remained as mysterious since the Yuan Dynasty."

"You mean," said Lao Hu, "the base that took me away, and I stayed with is the Xiling Sect."

"Yes," Lao Sha replied, "my master may be in that base too."

"So," said the tomb guardian, "The power behind the construction of the steel mill is also the Xiling?"

"Only only the Qiling Mountains can use this Guixin Fengshui to suppress the tombs." Lao Sha said, "and they built such a steel mill regardless of money and expenses to achieve their goals."

"Are they enemies or friends?" asked the tomb guard.

"There is such a big thing happening in the steel mill now," said Lao Sha. "They don't want to see it either. Something must have happened, breaking the balance for hundreds of years, so that they can't sit idly by."

After saying so much, everyone still couldn't figure it out.

The tomb guard said: "We cannot speculate on the intention of lifting the ridge now, but the thing underground has been alarmed. You two must follow the steel pipes to enter the underground. Maybe when you get underground, you will know the whole story."

"Then you can't just go in just go in." Lao Hu reminded, "Don't forget, I was the safety officer who installed these pipes back then."

The big man looked at Lao Hu, "Isn't it just a pipe? Isn't it harder than digging authentic tunnels?"

Lao Hu asked: "How long can you hold your breath?"

"About five minutes." Dana replied, "Under special conditions, you can grow a little longer."

"You may have been concerned about the dangers underground," said Lao Hu. "Even if you have the ability and have practiced martial arts, I bet that if you can climb in the tube for twenty minutes, you will be in a coma due to hypoxia."

Dana and Lao Sha looked at each other, and they did not expect this section.

"There is a specialized blowing equipment," said Lao Hu. "It is available in the steel mill, but because the pipes are too long, I calculated that the blower can only barely maintain the circulation of parallel pipes on the ground. When you enter the vertical pipe, you will face the danger of hypoxia... Have you planned how to climb down from the vertical pipe?"

Dana and Lao Sha shook their heads in a daze.

"You have never planned anything," Lao Hu's application was extremely contempt for them, "Just plan to enter the pipeline?"

"Don't keep it aside." Dana said to Lao Hu, "You are my leader, so you have to help me with this."

After hearing this, Lao Hu stopped going around in circles and said bluntly: "The pipe on the ground is a shaped shape, and the center is the two steel pipes in the pump room. Since you find out what Feng Shui this steel pipe is, then the two pipes must be divided into yin and yang."

"That is," Lao Sha interrupted, "only one pipe can pass through."

"There is all water inside a steel pipe," said Lao Hu. "The other one has never been used. You are lucky and met me. I was a safety officer back then, and I was there during the construction."

"Then you can tell if you can get one into it?" The big man knew that Lao Hu must be confident.

Sure enough, Lao Hu took a spare candle on the incense table, gestured on the ground, drew a font, and crossed out the two pipes on the upper right and lower right, "These two pipes are used to circulate water, you can't go." Then Lao Hu wiped out the upper left pipe. The distance that stretched out was relatively long, so it was not appropriate for you to climb from here."

"Now there is only the lower left pipe left," Lao Sha nodded.

"We must first turn off the valves that cannot be crawled on the top of the pump room," Lao Hu said. "Otherwise, the air that is agitated by the blower will penetrate into these three pipes, making the air thinner."

"There is one last question left," said Dana, "how do we climb down from the vertical pipe."

"You have practiced it," Lao Hu smiled and pointed at Lao Sha, "I don't know how he reached out."

"If you have something to say, just say it." Lao Sha said, "It's all for this." Then Lao Sha took out his font-shaped ornaments for Lao Hu to show.

After seeing it, Lao Hu's face changed a little. Then he said, "It seems that I am too worried. You can't tie the ropes down, this is definitely inappropriate, because the distance is too far, such a long rope and the weight is too large, so you cannot carry such heavy equipment to crawl the pipe. So you must..."

"What must?" Dana and Lao Sha asked at the same time.

"Remember that the vertical height of the pipe is about 300 meters," said Lao Hu. "This is the most difficult part. You must have two back-to-back steps, stepping on the wall of the pipe and slowly moving down."

"A vertical distance of three hundred meters!" The Dana almost jumped up, "If you miss it a little, you will fall down. Are you fooling us?"

Lao Sha was also thinking that he did have the ability to climb on a smooth wall, but he was no problem with more than ten meters or even dozens of meters, but three hundred meters... Lao Sha was also shaking his head.

"You don't know one thing." Lao Hu said easily, "Every twelve meters, two cross-shaped steel frames will be supported inside the pipe wall. This is a lining process for large pipes."

"Why is it twelve meters?" Dana asked curiously.

"These pipes are welded in sections," Lao Hu continued to teach Da Na's class. "The length of each pipe is twelve meters, and the lining is supported at both ends of the pipe. That is to say, you only need to stick to a distance of twelve meters at a time to rest for a while and then continue. Even so, you have to perform more than twenty-five movements... This kind of task is completely impossible for ordinary people to sit."

"We should be able." Dana calculated, "Twenty-five times, each time falling twelve meters. We try."

"There are two more issues to face, which are very important," Lao Hu was a safety officer after all, and thought of everything. "The first question I mentioned earlier. Due to the pipe distance, the air of the blower is difficult to enter the vertical pipe after convection of nearly one thousand meters in parallel pipes. This is why I ask you how long you can hold your breath. Moreover, the toxic gases have relatively heavier specific gravity, so the more you go, the more dangerous you are."

Dana and Lao Sha looked at each other, and they really didn't expect that such an ordinary thing would be so hugely dangerous.

"Second point," Lao Hu continued to make a comeback, "What would you do if you can't find a way out underground?"

Lao Sha was silent for a long time before answering, "You must return on the spot."

"How many opportunities do you think are you able to come back now?" Lao Hu asked.

"There is almost no chance," said Dana. "But since someone had done such a large project and installed such a long pipe to the ground back then, I believe that there is no dead end below."

"I agree with him, too," Lao Sha said, pointing to Dana.

"I have so much advice," said Lao Hu. "Let's go."

The patriarch had not spoken around him, so he could only silently follow Lao Sha Dana and Lao Hu Erzi to Hufu Town. When he arrived at the gate of the steel mill, the patriarch bowed to Lao Sha and others, and then turned around and left.

Lao Hu looked at the time and it was still past one o'clock in the morning. Then several people walked to the vicinity of the pump room. The pump room had been brought by Director Liu and pressed the top of the round well with concrete stone slabs. Only two pipes with a diameter of nearly one meter appeared. Under Lao Hu's arrangement, Erzi climbed up the top of the pipeline and closed the valves in the upper right and lower right and upper left at the three-way (a kind of pipeline fitting used for pipe diversion.).

The end of the lower left pipeline is above the smelting workshop and is not closed.

Then several people found a blower from the tool room. The driving in the workshop could still be used. Erzi is worthy of Dongsheng's nephew. He operated the driving, hoisted the blower to the end of the pipe, then barely put the blower into the end of the pipe, then climbed onto the working platform, and pulled the blower's power cord. Then the blower started working, and the strong wind whistled violently in the pipe, and over time, he could still hear the rumbling air convection.

Lao Hu looked at the watch and calculated the time. When the blower was working until four o'clock in the morning, Lao Hu said: "The dirty air in the parallel pipeline has been exchanged almost the same. You can go in."

Erzi climbed up the driving operation table and lifted the blower out of the end of the pipe. Lao Sha and Dana climbed into the steel pipe. Lao Sha and Dana observed the inside of the pipe. This was a steel pipe with a diameter of 800. Although people could not stand inside, they still had a large space for movement.

Lao Hu shouted to the two of them outside: "I hope you can come back safely."

Lao Sha and Da Na responded, and then crawled into the inside of the pipe one after another. A loud noise sounded behind him, and a strong wind blew from behind. An unexpected advantage appeared. They crawled very easily under the wind, but Lao Hu did not mention this link. It seemed that Lao Hu was a very cautious person, not a bad news.
Chapter completed!