After Zhang Shukai finished speaking, Wu Zhongyuan secretly breathed a sigh of relief, Zhao Ying and the others have been trapped for a long time, the longer the delay, the smaller the chance of their survival, if they can use a gas cylinder to blow up the stone door, it can save a lot of time, but he still has concerns, "Can the power be controlled with this thing?"

Zhang Shukai said, "The power of the explosion can be adjusted by adjusting the air pressure in the bottle, but the effect is definitely not as good as the accurate blasting of *." ”

Wu Zhongyuan didn't ask again, Zhang Shukai is an expert in this area, and he doesn't need to worry about these questions.

The gas cylinder is also connected to the breathing apparatus and needs to be disassembled, Zhang Shukai said to Lu Jiahui while dismantling, "Try to notify the people inside and let them stay away." ”

"The stone door was so tightly closed that they might not be able to hear outside. Lu Jiahui said.

Wang Xinran was helping to disassemble the respirator, and after Lu Jiahui finished speaking, she said, "They can't hear the sound of talking, they can always hear the sound of percussion, and use a hammer to knock out the Morse code." ”

"Morse Code is ...... Ordinary People Listen"

Wang Xinran interrupted Lu Jiahui's words, "Are they ordinary people? They don't even know the Morse code, how can they be spies." ”

Lu Jiahui nodded, and knocked on the stone door with a hammer, her specialty is underwater archaeology, but her own job is a special agent of the 18th Branch, and the Morse code is naturally memorized.

The two brought back two sets of respirators, but Zhang Shukai only used one gas cylinder, adjusted the air pressure in the bottle through the barometer, and placed the gas cylinder horizontally directly below the connection of the two stone doors, and then moved the stone box and stone platform fragments in the stone chamber and pressed them on the gas cylinder.

Physics is not Wu Zhongyuan's strong point, but he still understands basic knowledge, and Zhang Shukai's move is to adjust the impact angle of the explosion wave.

At this time, Lu Jiahui had already knocked on the Morse code several times, but there was no response in the stone room.

"Don't knock, put on a gas mask. Wang Xinran said to Lu Jiahui.

Lu Jiahui stopped beating, put down her backpack, and took out a gas mask to wear.

Wang Xinran threw a set of gas masks over, and Wu Zhongyuan reached out to take it, but he had never worn such a thing before and didn't know how to wear it.

Seeing this, Wang gladly glanced at him, walked over to help him put it on, his movements were very rude, and he didn't care whether he pulled his hair or not when he put it on his head, and didn't care if it would strangle him when he tightened the belt.

Wu Zhongyuan knew that she was angry, so he endured it and didn't say anything, he had been thinking about Lu Jiahui's words for the past ten minutes, if Wang Xinran was really jealous, it meant that Wang Xinran liked him, but Wang Xinran didn't seem to have any specific performance in this regard before, but it was true that she hated Zhao Ying deeply, and he always thought that this disgust was because of different positions, but until now he was not sure whether Wang Xinran's dislike for Zhao Ying came from jealousy rather than because of different positions.

With doubts in his heart, he recalled that Wang Xinran's attitude towards him was not very friendly from beginning to end, at least not very polite, but outside the dungeon where the great wizard was sleeping, two staff members of the 18th Sub-Bureau who pretended to be excavator drivers wanted to arrest him, Wang Xinran was very eager to stop him, and even did not hesitate to fire a warning shot, and it was precisely because of helping him escape that Wang Xinran was punished afterwards and was transferred from his post.

Previously, he had always thought that the reason why Wang Xinran did this was because she was a good person who kept her promises, but he had always ignored a very important point, that is, Wang Xinran was an official person, and the execution of tasks should not be affected by personal likes and dislikes.

While Wu Zhongyuan was stunned, Wang Xinran was talking to Zhang Shukai, and then he also measured the length of the stone chamber, as if he was choosing the angle and distance of the shot.

The two seemed to have encountered some problems, and after a while, Wang Xinran walked over to Wu Zhongyuan, "Give me the gun." ”

"Huh?" Wu Zhongyuan tilted his head to look at her.

"Give me the gun in the bag. Wang happily went to zip Wu Zhongyuan's backpack.

"Don't you have a gun?" Wu Zhongyuan said, wearing a gas mask and being able to speak, but in a low voice.

"Our guns can't blow gas cylinders outside of the blast range. Wang Xinran threw a look of disdain at Wu Zhongyuan again.

Wu Zhongyuan stood still, Wang Xinran took out the pistol and threw it to Zhang Shukai with his backhand.

Wu Zhongyuan's pistol was given to him by Zhao Ying, it should be imported, and the power may be a little greater than that of a domestic pistol, the four of them withdrew from the stone room, put on gas masks, and Zhang Shukai shot sideways.

The gas cylinder exploded, and the explosion sound was smaller than Wu Zhongyuan imagined, and it was very dull, but because the stone chamber was relatively closed, the gas waves caused by the explosion had nowhere to vent, and the grass and wood ashes in the stone chamber rushed out, and several stone doors outside were all knocked open.

When the dust settled, the four of them re-entered the stone room, only to see a gap blown out under the closed stone door, through which you could see the top door stone above the ground, which was in the style of a warped top, with a shaft in the middle, much like a seesaw.

"The air is fine. Wang Xinran was the first to take down the gas mask.

The three of them took off their gas masks one after another, and removed the gravel and other objects piled up outside the door, Wang happily reclined and tilted his head, looking through the gap in the stone door, "It was very dark inside, and there was no blue light." ”

After Wang Xinran finished speaking, Lu Jiahui handed over a small strong flashlight, Wang Xinran reached out and took it, shining it inside, "It's also a stone room, about the same size as the previous ones, and there is also a stone platform near the door, and there are a lot of broken wood and bullet shells scattered on the ground, they are not here." ”

After a brief observation, Wang Xinran stood up and stretched out his hand to push the stone gate, Wu Zhongyuan and Lu Jiahui stepped forward to help, Zhang Shukai pulled out his pistol, with both guns in his hands, and was on guard.

After the stone door was pushed open, Wang Xinran used a flashlight to illuminate and observe again, Wu Zhongyuan has night vision, and he can see the situation in the stone room clearly without the help of a flashlight, the first thing he looked at was the top of the stone room, unlike the previous three stone rooms, the green fluorite without lighting on the top of this stone room was not destroyed, but was not placed in the first place.

There were a lot of bullet casings on the ground, and there were signs of explosions, and the stone slab in the middle of the stone chamber was blown up, revealing a two-meter square crater, and the exact depth of the crater could not be seen due to the angle.

In addition, there are a lot of wood scattered in the stone room, not fragments of wood, but the roots of trees, these broken roots are of different sizes, the thick ones have the thickness of the mouth of the cup, the thinner ones are similar to the thickness of the fingers, the long ones are two or three meters, and the short ones are dozens of centimeters, some are broken by bullets, and some are flat stubble, which should be cut by a knife.

It was not only the strange roots that made the four of them nervous, but also the mottled blood stains on the ground, which indicated that someone was injured and that the owner of the tomb was no longer playing with everyone.

After observing the situation in the stone room, Wang Xinran squatted down, picked up a piece of gravel and threw it into the pit in the middle of the stone room, and the echo was transmitted back after two seconds, not the crisp sound of touching the stone surface, nor the sound of water, but a relatively dull bass, which should have touched something not very stiff after falling.

"It's between eight and ten meters deep," Wang said, "and it's likely that there are plants like man-eating trees growing in the pit." ”

Wu Zhongyuan did not question Wang Xinran's judgment, because the five elements of the wounded door belonged to wood, and it was not surprising that there was a man-eating tree hidden at the bottom of the pit, but what he didn't understand was how the man-eating tree could survive underground for so many years.

Wang Xinran moved the flashlight to shine again, "Judging from the bloodstains, they went inside." ”

"Why did they close the stone door?" Wu Zhongyuan was puzzled, the stone door to the north of the stone chamber was also closed.

Under his full attention, Wang Xinran also forgot to be angry with Wu Zhongyuan, and said casually, "It may also be the person who escaped earlier." ”

"What is the motive?" Wu Zhongyuan asked.

"Probably to keep the pursuers at bay. Wang happily guessed.

Zhang Shukai said beside him, "The blood stains have not turned black yet, and it will not be more than twelve hours." ”

Wang nodded happily and then threw stones again to ask for directions.

"You stay outside, I'll go in. Wu Zhongyuan said.

"Don't you see that he's serious," Wang said happily, "don't act rashly until you find out the situation." ”

"The area from the doorway to the stone platform should be safe and not trigger the trap. Wu Zhongyuan walked into the stone room.

Wang Xinran also followed, Zhang Shukai shouted "Hey", and when Wu Zhongyuan turned around, he threw the gun in his left hand to him, and he left Wu Zhongyuan's pistol, because the next few stone doors were likely to explode.

This stone platform is the same size and style as the previous stone platform, and the stone platform is covered with thick dust, indicating that Zhao Ying and the others did not get close to the stone platform at all, and they may think that if they don't touch the stone platform, they will not trigger the mechanism, but it turns out that they think about the problem simply, even if they don't want to get a reward, they must answer the question.

There are forty-two round holes on the stone platform, wipe off the dust on the stone platform, the words on the stone platform are revealed, there are twelve words on the stone platform, corresponding to twelve round holes.

"Why is there no title?" Wang Xinran wondered.

"No need to ask, he's asking me what the names of the two wizards are. Wu Zhongyuan stretched out his hand and grabbed the stone bowl, and there were indeed two stone balls inside.

"Why did he come up with such a question?" Wang Xinran doubted.

"Because only I know the names of the two wizards, he did it to determine my identity. Wu Zhongyuan said.

At this moment, Lu Jiahui said from the door, "I figured it out, the top door stone here has two tenons, one alive and one dead, and it takes two openings and closings to completely lock it." ”

"What is the purpose of his use of this top stone?" Wang asked happily.

"The only function of the top stone of this structure is to leave a chance to open after the closure, and it can never be opened again after the second closure. Lu Jiahui said.

Wang Xinran nodded at Lu Jiahui, then turned his head to look at Wu Zhongyuan, "Are you sure he's asking for the names of your two wizards?"

"Sure, because both of their names are in these twelve words. Wu Zhongyuan said.

"Why did he do this?" Wang Xinran still couldn't figure out.

Wu Zhongyuan couldn't think of why, and after a short period of silence, he put the two stone balls into two of the round holes.

The stone ball was put in, and the vibration came again, but this time the vibration did not come from the middle of the stone chamber, but from the stone platform itself, the stone platform was divided into two from the center, and slowly moved out half a foot to the left and right, revealing the stone pier that supported the table, and the stone pier had a square groove in the center, and a small stone box was placed in the middle of the groove.

After glancing at Wang Xinran, Wu Zhongyuan picked it up and opened it, only to see a white stone in the stone box.

"Is it a spirit stone?" Wang Xinran was stunned.

"Yes!"