The strongest soldier

The sand valley is very large, surrounded by towering sand dunes. The bottom of the valley is full of sea buckthorn trees. How can there be an underground river passing through such a large place? Luo Zheng looked at Cao Xi in surprise. Cao Xi looked around a few times, rushed to the middle and continued to observe, and quickly rushed towards a place with dense seabuckthorn leaves. He said to Luo Zheng: "The seabuckthorn tree here is It is greener than the surrounding areas, which shows that it has the most water, and there is an underground river below."

"Okay, I'll dig it." Luo Zheng thought for a while and quickly agreed, saying that he was about to take action.

"No, I'll come first." Cao Xi said quickly.

Luo Zheng looked at Cao Xi in surprise, how could a lady do such a rough job first? He took out the engineering shovel and was about to start, when he saw Cao Xi put down the package and took out three cylindrical things. Each one was about two feet long. They looked dark and made of unknown materials. He couldn't help but asked in surprise: "What is this?"

"You'll know just by looking at it." Cao Xi didn't explain. He picked up a cylinder and didn't know how he fiddled with it. He actually pulled out a section from it, and then continued to pull, like a retractable antenna. The longer it gets, it soon becomes a pole about ten meters long, and it looks very strong.

Luo Zheng couldn't help but be suspicious. He saw that Cao Xi turned every section he pulled out, and the connection part was reinforced and stuck. He exchanged a look with Lan Xue and curiously went up to take a look. Each section was very thin and hollow inside. , couldn't help but touch it, but found that it was very hard, and couldn't help but ask: "What material is this made of? It can be pulled out so long, it's a good thing, but what is it used for?"

"Don't worry, we'll find out later." Cao Xi said casually, took out a sharp metal head from his bag and put it on, then picked it up vertically, picked a place and pierced it hard against the ground, and then pulled it out. At that time, the hollow part of the metal head was filled with soil. Cao Xi turned on a mechanism above, and the metal head actually opened, and the soil inside fell out. Cao Xi closed the metal head and continued to plunge hard into the ground, repeating this process.

Soon, a hole as big as a fist appeared in the ground. As Cao Xi dug hard into the ground to bring out the soil, the hole became deeper and deeper. Luo Zheng looked curious, but seeing that Cao Xi was focused, he did not disturb him and signaled Lan Xue to be alert. Then quickly turn on the signal transmitter and get in touch with Blue Star, allowing Blue Star to locate itself and then contact other troops, so that other troops can come over to join them.

After doing all this, Luo Zheng found that Cao Xi had dug down five or six meters deep. He pulled out a pole of soil, picked it up and looked at it carefully, smelled it, and continued to hit it down. His expression was focused. Luo Zheng did not disturb him. You came to Lan Xue and asked in a low voice: "What is she doing?"

"You don't know how to dig holes?" Lan Xue asked curiously. Seeing Luo Zheng's confused look, he explained: "It is said that tomb robbers like to use Luoyang shovels to dig holes. They can judge whether there is any dirt underneath. Ancient tombs, ancient tombs of what age, etc. It sounds very mysterious. Every other line is like a mountain. I don’t understand it. Her tool should be the Luoyang shovel. It is just an improved special tool. It looks very good. I don’t know what it is. Made of material.”

"You mean she used the method of digging a robbery hole to dig out the tunnel?" Luo Zheng asked curiously.

"Yes, just dig a hole down and expand the entrance to become a robbery hole. It's very simple. If there is an underground river below, the soil will fall down along the robbery hole and fall into the underground river. If there is no underground river below, River, then this hole will be difficult to open and will have to be dug manually. However, seeing how focused she is and how certain she is, there should be an underground river below, so we will wait and see." Lan Xue said in a low voice.

"Hey, what a good idea. It's like a mountain across the street. I didn't think of this method. If we can get through it, we can really dig a hole in the ground in two hours. As long as people can get down, it will be easy." Luo Zheng was startled, and immediately He agreed in surprise, feeling a little more confident about the mission.

Cao Xi was still working on the robbery hole with a focused expression. His movements were skillful and he looked like an expert at first sight. His back was stretched out for a long time under the setting sun at dusk. Luo Zheng walked up and observed carefully for a while. When he saw Cao Xi's forehead covered with sweat, he said: "I've probably mastered the key points. How about I do it and you rest for a while."

"Okay, it must be straightened, wait a moment." Cao Xi said breathlessly, picked up another tube from the bag, pulled it out, connected the original tube, and continued to Luo Zheng: "Come on, Drill down to a certain depth and then pull out a section. The total length of the three pipes is thirty meters. Use the force vertically downwards and do not deviate, otherwise it will take a lot of effort and the pipes will be easily damaged."

"Okay, just keep an eye on the side and remind me immediately if you do something wrong." Luo Zheng promised seriously, took the tube and stabbed it down hard, followed Cao Xi's example and pulled it out a little, and then stabbed it harder again, and so on. After three times, he pulled them all out and opened a small mechanism on the metal head. The metal head opened automatically and the soil inside fell out. Luo Zheng took a closer look and found that it was all wet sand, and he couldn't help but be overjoyed.

"Wait a moment." Cao Xi squatted down to check the wet sand, picked up some and smelled it, and said with a happy face, "There is no rancid smell, which is great. There should be an underground river below. Continue."

"No problem." Luo Zheng was overjoyed when he heard this and continued to hit with great enthusiasm.

Ten minutes later, Luo Zheng drilled down to a depth of more than ten meters. The wet sand he pulled out was even more hydrated. Luo Zheng was overjoyed and continued to drill down. When he reached twenty meters, Cao Xi pulled out another pipe. He also pulled out some, connected them together, and went into battle again to beat down.

After stretching the pipe for a while, more than half an hour passed before I knew it. There was actually dirt in what was pulled up. Cao Xi was so happy that he asked Luo Zheng to change hands and rested next to him. Lan Xue also came over curiously. Look, I am overjoyed when I see the soil. This is a sign that we are almost at the end.

After beating for a while, Luo Zheng released the soil brought out from the metal head, then adjusted the angle again and plunged downwards. Suddenly, he felt his hand loosen, as if there was no force underneath. He couldn't help but be startled, and instinctively grasped the pipe tightly. After poking it down, there seemed to be no resistance. He couldn't help but look at Cao Xi in surprise and said, "It seems to be clear. Come and take a look."

"Hold the tube tightly, don't drop it." Cao Xi, who was drinking water, was overjoyed when he heard this. He quickly threw the water bottle on his backpack, came over immediately, grabbed the tube and signaled Luo Zheng to let go, then tried it himself, smiling with joy. , shouted: "Quick, give me a small stone."

Luo Zheng picked up a small stone on the ground and handed it over for no apparent reason. It was about the thickness of his thumb. Cao Xi took it and threw it into the hollow of the tube. Then he put his ear to the mouth of the tube and listened carefully. After waiting for a while, Cao Xi said excitedly. : "It's clear, I heard the sound of stones falling into the water. There is water, and it's not shallow. It's an underground river."