Wang Po and Lao Bowen quietly left the clinic through the back door without any entourage, and then followed a path into the back alley of the No. 7 boiler room.

In this small alley, which is not spacious in itself, there are large and small pipes, some of which are coiled on the ground to form a labyrinth-like pattern, and the other part extends from the back wall of the No. 7 boiler room, like arms on the wall.

Wang Po stood at the mouth of the alley, pointing at the pipes, as if trying to identify something.

Lao Bowen carefully observed the situation around him, for fear that someone would follow him.

After fifteen minutes, Wang Po patted Lao Bowen on the back and asked him to help him into the depths of the alley.

At this moment, Wang Po only felt that his two legs were as weak as being anesthetic, and he could only barely walk with the support of Lao Bowen.

Lao Bowen helped him all the way forward, he didn't say stop, Lao Bowen just kept walking.

When he arrived at a large pipe that was two meters thick, Wang Pocai patted Lao Bowen on the shoulder and signaled him to stop.

When he stopped, he quickly turned around and glanced in the direction of the alley, relieved to make sure that no one was following.

Wang Po walked to the pipeline, took a finger and gently knocked on the pipe wall five times, the sound was three long and two short, and before the aftersound of knocking on the pipe wall dissipated, he suddenly heard a "click" sound from inside the pipe, and then a secret door the size of a dog hole popped open at the bottom of the pipe.

Wang Po and Lao Bowen didn't dare to delay, and both shrank down and got in.

When the figures of the two disappeared outside the pipe, the half-meter-high door panel slowly fit into the pipe wall.

In just a few seconds, it merges with the pipe wall, and it is difficult to distinguish from each other.

Wang Po and Lao Bowen didn't know that when they got into the pipe, the thief was actually standing in the shadows of the back alley, staring at them without saying a word.

At seven o'clock in the morning, Tai Sui sent the thief saint hair to the health center, and asked him to keep an eye on Wang Po.

Tai Sui calculated that Wang Po would go to the underground test site to rescue soldiers nine times out of ten today, and the task of stealing the saint was to borrow Wang Po's hand to find the entrance to the underground test site.

From Wang Po leading people to surround the building to the present, the thief has witnessed that Tai Sui has calculated every step of Wang Po clearly, as if everything Wang Po did was arranged in advance by Tai Sui.

In addition to being shocked, the thief couldn't help but be a little afraid.

Thanks to Tai Sui, he didn't become the final boss.,Just this scheming.,This means.,This strength.,Which protagonist can afford it.。

On the other side, Wang Po and Lao Bowen shrank hard, struggling to crawl through the pipe.

This pipe only looks wide on the outside, but it is actually very narrow on the inside, and when people are inside, their arms and legs can't support it at all, so they can only move forward little by little by relying on the strength of their back.

This move took two full hours.

When Wang Po and Lao Bowen finally crossed the pipe and entered the deep Yongdong, they were both exhausted and could only collapse on the ground like mud.

I don't know what age this Yongdong was built, it is filled with a strong stale atmosphere, on the wall of the Yongdong, there is an extremely grand relief carving, but because the age is too old, the moisture has eroded the edges and corners on the relief, so that those reliefs have completely lost their original outline, and the content is difficult to distinguish.

Wang Po and Lao Bowen just felt that the giant silhouettes on the reliefs looked like figures in armor, and they were staring at themselves motionless with their heads down.

That strong sense of staring made Wang Po and Lao Bowen feel extremely uncomfortable, and they lay down for a while, feeling that their strength had recovered a little, and then they helped each other to stand up.

The walls of the cave are made of a special kind of luminous stone, which emits a faint light, which can outline the outline of the relief, and can also reflect the damp potholes on the ground with a faint sheen, but not enough to fully illuminate the road surface.

There are not only damp depressions on the ground, but also a lot of black acne, Wang Po and Lao Bowen themselves have exhausted their strength, plus they can't see the road clearly, and after falling several times, they finally came to the end of the cave.

This is a huge rock wall three feet high, the light is too weak, as far as the eye can see, the whole rock wall is black with a little purple gray, and it is impossible to see that there are no holes, secret doors and other things on the rock wall.

Before leaving, Leng Du told Wang Po that if he had to contact the people at the underground test site, he would come here and knock on the rock wall thirteen times, and the great master would come out to see him.

Wang Po has never entered the underground test ground, nor has he ever seen this great master, only knows that his name is Miyuan, and he is the world's first qi master before Mr. Yijie became famous.

Now, Wang Po had a very bad feeling, he felt that Leng Du might be lying to him.

What kind of great master, what kind of underground test site, may not exist, especially when he hit the rock wall with his hand, the sound coming from the rock wall was dull and weak, not to mention the person on the other side of the rock wall, even Wang Po himself couldn't hear it clearly.

After knocking on the rock wall thirteen times in a row, Wang Po took a few steps back, staring at the gray and black in front of him.

Nothing happened!

Five seconds later, Lao Bowen became impatient again: "This ...... What's going on! Didn't the sixth master say that as long as he knocked on the rock wall thirteen times, that great master would appear? ”

Wang Po didn't say a word.

At this moment, Wang Po became more and more sure that Leng Du must have deceived him.

At the beginning, Leng Du said that there were masters in the underground test field, it seemed that it was just to give Wang Po a little deterrence, he wanted to warn Wang Po not to try to betray himself, because the legendary top master would stare at Wang Po, as long as he dared to rebel, that person could kill him.

Leng Du is notoriously suspicious by nature, and it doesn't seem surprising that he can make up such a lie.

After all, even the personal attendants who grew up with him since childhood were often suspicious of him.

Cha......

At that moment, there was a soft sound on the other side of the rock wall.

The sound was very weak, but fortunately, it was extremely quiet in the cave, and even the sound of the embroidery needle falling to the ground could be heard clearly.

Wang Po and Lao Bowen were both stunned, and then they turned their eyes in unison and looked in the direction where the voice came from.

The sound continued, but it was too soft to tell if it was a real sound or some kind of continuous echo.

For a moment, Wang Po felt as if an area on the rock wall had suddenly recessed, and then he saw a light in that area.

A square block of stone was rapidly recessing, and the light was shining from the top of the stone width and the gaps on the left and right sides.

Wang Po immediately reacted, it was a secret door that was opening!

He hurriedly pulled Lao Bowen over.

When the secret door was fully opened, the light shone on the faces of Wang Po and Lao Bowen along the narrow doorway, and they were in the dark for several hours, and the two could not adapt to this strong light, so they could only raise their hands to block their sight, and only looked into the door through their fingers.

In the not-so-clear line of sight, a thin figure was walking towards them along the doorway.

Because the man was standing in the backlight, Wang Po and Lao Bowen could only see such a black silhouette, and they couldn't see each other's faces at all.

But even so, they could still feel the fierce momentum emanating from each other.