Inside the prison, on a cramped gray road that can only accommodate a few people, Luther and a few workers are pushing carts full of letters.

The vehicle was heavy, the rollers were under a lot of pressure, and the letters made a collision sound from time to time, but the workers and others were accustomed to it, and it would be strange if there was no sound under such high-speed transportation.

Only the worker next to Luther seemed to find that there was a section of the box that was quieter, but under the various sound exchanges, he did not pay too much attention to it, but silently and loyally, completed his task.

Suddenly, the special forces member, His Excellency Luther, stopped inexplicably, patted his head, showed a remorseful expression, and said to the workers:

"Oops, I have a couple of important letters that I forgot to put in the box."

"What then, Your Excellency?" Of course, the status of several workers is not as high as that of the special forces members, so they naturally wait for Luther to deal with it.

"I'll go back and get it." Luther pointed to the trolley in his hand: "And you go on, I will meet you later." ”

"Yes, Your Excellency." The workers did not have any doubts about Luther's words, but rather, they did not dare to doubt them, and after a few seconds, the group parted ways, and Luther looked at the workers who were far away, and immediately breathed a sigh of relief.

He looked left and right, and after making sure that no one was following him, he was in a route, and suddenly turned into a path, and the trolley made the sound of rollers, rolling forward one after another. Luther pushed the door open in front of him, the sound of water began to flow out, Song Yingsheng pushed open the box, and what he saw in front of him was the entrance to the sewer.

The sewer is cylindrical, lying horizontally, Song Yingsheng and Luther are standing on a flat surface, and down are the crowded water traces of the sewer, and the flowing water does not fill the cylindrical channel, but is about half full, which can be understood as the shape surrounded by x^2+z^2=1 and z≤0.

The whole space is in a damp state, and the moisture seems to be directly formed on the mirror surface, Song Yingsheng and Luther exchanged glances, and Luther said to him, if he regrets it, it is still too late.

Song Yingsheng just shook his head and pinched his nose, although he could faintly smell the stench coming from the sewer, but he didn't care too much, those who become big things must be sacrificed, he and Luther simply explained a word, and then jumped down directly.

Thump! The water trail fell on the plane and bounced up, Song Yingsheng didn't start diving, after all, this is a sewer, and it's still not very clean. Of course, this should not be a place to dissect sewage, and if it is, it will be a hundred times dirtier than here. He preferred to believe that this was where the river flowed into the prison, and that from here you could reach the 'moat,' which Luther had told him.

Treading on the water all the way, Song Yingsheng used the rhythm of breaststroke, neither fast nor slow, swimming several kilometers, this is just a general impression, the specific distance, may be more, or less. The air was getting less and less, and the water level was rising more and more, and Song Yingsheng could clearly perceive that he might soon be diving.

Sure enough, as the distance got farther and farther away, he was gradually about to reach the river, and the water level was directly raised, occupying the entire cylindrical sewer, Song Yingsheng forcibly opened his eyes under the water to find out the route, fortunately there was no fork in the road here, otherwise, although he was not a road idiot, it was possible that he would get lost in this kind of place.

He can only rejoice that the designer of the sewer has a relatively simple thinking, but he must not think that someone can hold his breath for more than two minutes, of course there is, but this possibility is too rare, and unfortunately, Song Yingsheng is such a person, he swam all the way, and even began to accelerate, because he seemed to see that the sun was shining outside.

But at this time, Song Yingsheng suddenly found that the sun in front of him actually had an obstacle from him, which was an obstacle to his freedom, composed of non-rusty metal, a kind of tic-tac-toe guardrail-

Only water, garbage, or small animals can pass through, but not people! Sure enough, it's really a foot high, the magic is a foot high, maybe the designer really thought that someone would escape from prison, the reason why you were asked to take your time in front of you is that you can't pass the last step!

And if it were ordinary people, they might really not be able to deal with it, because they couldn't carry heavy equipment that could be cut, and after diving for so long, Song Yingsheng was also stunned at first, but when he thought of one of his things, the thoughts in his heart suddenly calmed down.

Remember that chemical saber? The young man in the sci-fi copy gave him, it is said that he can cut anything, which is similar to the spear in the contradiction, Song Yingsheng did not hesitate, he quickly picked it up, and the knife fell, and the entire tic-tac-toe wall was actually cut in this way, forming a big gap, which made Song Yingsheng who saw it couldn't help but be surprised.

Is this the power of future technology? I've really earned it now...... Song Yingsheng thought happily in his heart, he actually used a hundred plot coins, no, it should be counted as two hundred in exchange for this kind of thing, it is really useful.......

On the contrary, it was mind control, and now he inexplicably began to feel that that thing was not cost-effective at all, and it was impossible for him to use it against Yun Hu'an. And for teammates, uh, maybe it's a little useful, but it can't be used often, and overall, it's still too wasteful.

In the midst of all kinds of thoughts, Song Yingsheng moved his body, used the breaststroke posture, left the gap, and when he breathed again, he found that he had reached the river area that Luther said.

Ah, the sun's rays are wonderful, is this the feeling of freedom? Song Yingsheng felt the heat and ultraviolet rays, and couldn't help but feel a burst of light in his heart, but he hadn't run away yet, and he didn't know if they had a water patrol boat, so he still had to be cautious.......

So after he breathed enough oxygen, he dived into the water again, this time for up to three minutes of standby, and when he finally reached the shore, he did not stay long, but immediately changed his clothes (bought by the snail copy), which made him feel a little more relieved and began to approach human society.

It is worth mentioning that although Minos, where Song Yingsheng is now, is an imperial system, ruled by the Great Commander and the Great Emperor Donald, the overall level of civilization is close to Song Yingsheng's real society, that is, the 21st century. Therefore, wearing the clothes of a snail copy, apparently, there is no problem.

Song Yingsheng also had a little money in his hand, this was a coin given to him by Luther, it was worth a little money, Song Yingsheng used it to stop a taxi, sat on it, the driver asked him where he was going, he only responded:

"National Library."