The three of them quickened their pace and ran in the direction of the current, and gradually a light appeared in the field of vision of the three people.

After walking in the dark underground drainage pipes for so long, I suddenly saw a light coming, and I was a little uncomfortable for a while.

As the point of light grew larger, the sound of the water became more and more rapid. Luo Hao, Zhao Tianyu, and Casvo stood at the mouth of the drainage pipe at their feet, looking at the scene in front of them, Luo Hao's brows couldn't help frowning.

The drainage pipe was disconnected to their position, and the drainage pipe under their feet was about twenty meters away from the drainage pipe opposite, and between the two water pipes was a sewage stream, I don't know the specific depth, and the sound of the water flow came from this sewage stream.

Looking up, there are three rectangular cast-iron manhole covers with horizontal bars, each about 50 centimeters wide. It should be no problem to climb up the "U" shaped iron ladder nailed into the bricks above your head and pass without carrying equipment, but it is estimated that it will be difficult to pass through if it is the size of a shark tower.

On the cast-iron manhole cover, from time to time there are feet in military boots stepping on it, and the light seen before is also projected from here - in.

Luo Hao clicked on the PDA to check the drawings inside, and found that the drainage pipe at this location was not disconnected like now, but should have been remodeled later.

In other words, even if Luo Hao tried to erect a rope to pass through the sewage stream, it would be useless to reach the drainage pipe on the opposite side.

Because the drainage system in the prison has been remodeled, Luo Hao currently has the drawings that Situ Kong has worked so hard to get have completely become a pile of waste paper, and if he uses those drawings as a reference, he is likely to get completely lost in the pipeline and be trapped in it.

"I should have thought of it a long time ago!"

Luo Hao slammed his fist on the inner wall of the drainage pipe, and said with some chagrin: "These drawings were left twenty years ago, when this prison was first built, the most original design drawings, after such a long time, the drainage pipe system under this prison must have been transformed, and I am still trying to make an action plan based on this outdated design drawing, it's really stupid!" ”

"No one expected that things would change like this, and it can only be said that people are not as good as heaven." Zhao Tianyu patted Luo Hao on the shoulder and said, "With the current situation, it is basically impossible to use the prison's drainage pipes to get close to the underground cell, we can only go back first now, and then see what the fox finds on their side." ”

Luo Hao nodded and withdrew his fist. Things have come to this point, and it is useless to dwell on this anymore, so we can only hope for Zhu Zhiyang, Yun Lingfeng, and Qi Fan.

After Casvo drove Zhao Tianyu and Luo Hao back, Luo Hao said what he had detected, which also caused other people to sigh.

Xu Xudong proposed to let Situ Kong "patronize" Oromid's private library one more time, but Song Xuan objected.

When exactly this transformation was completed, probably no one knows except Fermi and his dead Lao Tzu; It is also unclear whether this transformation was carried out in the hands of Fermi or in the hands of his father.

And according to Situ Kong, when he was looking for the design of this prison, he searched through almost the entire library, but except for these drawings he photographed, he found no other drawings.

In other words, the renovation drawings of this prison are not stored in that library, and there is no way to find them.

The atmosphere in the living room suddenly became a little dull, Luo Hao put his fingers in his hair, buried his face in his hands, and while waiting, he secretly prayed in his heart that Fermi hadn't modified the railway.

Everyone waited until eight o'clock in the evening, and they didn't see Yun Lingfeng, Zhu Zhiyang, and Qi Fan come back, and they couldn't help but feel a little strange.

Zhou Bai glanced at the watch on his wrist and said, "It's almost nine o'clock, why haven't you seen the three of them." Why don't I go out with the bee eaters and the hummingbirds? ”

"No need." Zhao Tianyu shook his hand at Zhou Bai and said, "If the strength of the three of them is difficult to get out of trouble, it is useless for you to go over, just sit here and wait for them to come back." ”

As soon as Zhao Tianyu's words fell, there was a rhythmic knock on the door with three short and one long, and after Luo Hao got up to confirm the people outside, he opened the door.

And when I saw standing outside the door, my face covered with dust, and my clothes were also stained with green plant juice, I looked a little embarrassed.

Zhao Tianyu took three cans of cold drinks from the refrigerator, threw them to them, and said: "The underground drainage pipe of the prison has been built, and it is different from the original design drawings, so it is basically not feasible to sneak into the prison through the underground drainage pipe of the prison and carry out rescue." ”

Hearing Zhao Tianyu's words, the faces of Zhu Zhiyang, Yun Lingfeng, and Qi Fan suddenly changed. Luo Hao observed the words and looks, and immediately noticed the abnormality of the situation, and asked a little nervously; "Is your railroad being built as well? Or did you say that the railroad was not found? ”

"We've found the railroad, and it doesn't look like it's been rebuilt." Zhu Zhiyang raised his eyes, glanced at a few people in the living room, and said, "It's just that it's very difficult to approach the prison by railroad." ”

Zhu Zhiyang unfolded a map of Vanagoga, pointed to the lines drawn with pencil on it, and said: "The railway is located under the surface, although it is on an upward trend, but the nearest exit is almost 30 kilometers away from the prison. If we want to use the railway to get close to the prison to save people, we must not only think about how to approach the prison, but also how to retreat, and the train must be snatched, otherwise even if we save people, we will not be able to evacuate. However, that train should also be within the range of their key guards, and it will be very difficult to snatch the train and save people at the same time, with our current manpower! ”

This situation is indeed not conducive to rescue, Luo Hao stared at the map motionlessly, thinking about the solution. Zhao Tianyu didn't make a sound to disturb Luo Hao's thinking, because as a teacher, he wanted to teach Luo Hao to think, not affect his thinking.

Only in this way can Luo Hao go further, and even surpass himself one day in the future.

After thinking for a long time, Luo Hao suddenly pointed to the map and asked Zhu Zhiyang, "Where is this railway exit?" ”