Four hours is not long, but it is not short, several groups of people take turns to be on duty at night, but they all sleep a lot more peacefully, and when they wake up again, the corridor still looks unchanged.

Xia Yanru woke up early, and rested for more than 2 hours, and spent the rest of her time studying the changes in the wall, but fortunately, the effort was rewarded, and after nearly 2 hours of research, she really found a location of the mechanism.

When everyone woke up one by one, Xia Yanru said what she had discovered, and everyone was overjoyed after hearing it, and at the same time, they couldn't help but feel a little ashamed in their hearts, they were not as good as a female comrade who knew how to find a way out.

"Sister Xia, then how to open this mechanism?" Tu Hongxing stared at the wall with a mechanism that Xia Yanru said a few times, and it didn't look like it had a mechanism.

"These bricks can be moved, based on the Nine Palaces Technique, as long as you unlock the password and press the right brick to open it." Xia Yanru explained that this was the mechanism she saw in "Tibetan Technique", and she was not sure at first, but after verifying it a few times, she finally determined that the mechanism on this wall was the Nine Palaces Mathematics Technique.

"Nine Palace Mathematics! Comrade Xia still knows the Nine Palaces Mathematics? Zhang He stepped forward quickly in shock and walked in front of Xia Yanru, this nine-palace number technique is not simple, Xia Yanru can understand it at such a young age.

"I don't understand, but it's enough to solve this mechanism." Xia Yanru said truthfully, she was not deliberately modest, but she really did not study the Nine Palaces Mathematics in depth, but she had already eaten most of the content about the Nine Palaces Mathematics in "Tibetan Technique", so she dared to say that she could unlock the mechanism.

"Captain Xiao Xia is modest, how can he not be proficient in unlocking the Nine Palaces Mathematics Technique." Zhang He obviously didn't believe it.

Xia Yanru didn't care what the other party thought, anyway, she didn't lie to anyone, after saying what she should say, she turned her head and focused on the wall.

Speaking of which, Xia Yanru would find this mechanism, and thanks to her sensitivity to space, at first she didn't expect that such a flat wall would hide a mechanism, until she inadvertently swept it with her ability, and then she realized that the brick gap on this wall was a little special, and after careful study and exploration, it was determined that this wall was a mechanism arranged by using the Nine Palaces Mathematics Technique.

"Captain, do you need us to do anything?" Hu Fei thought that he couldn't count on other female comrades for everything, even if they were the captain, it was really unreasonable for them to sit back and enjoy their success.

"Be vigilant." Xia Yanru said without looking back.

"Yes." Hu Fei didn't feel that Xia Yanru was casually perfunctory, maybe there would be danger after this mechanism was opened, and they could avoid accidents by being on guard.

"Nine palaces, that is, two or four for the shoulder, six or eight for the foot, three on the left and seven on the right, one wearing nine shoes, and five in the center." Xia Yanru recalled the content of "Tibetan Art", compared the wall in front of her, and began to press the corresponding bricks according to her own understanding.

It wasn't until the last brick was pressed that the wall slowly cracked out of the middle, and the people who were choked with dust around them retreated away.

"Good girl, this is really a hole!" When the dust cleared, and there was no danger, the crowd slowly approached.

"Look, what's up there?" As soon as he entered, Wu Lian was very shocked and pointed to the top of his head and shouted.

"Oh my god! Are these all big silkworm pupa? Yu Feng only felt that this densely hung upside down thing was like a silkworm chrysalis, and he looked upside down.

"This is a human chrysalis, we should have gone to the burial pit or the sacrificial pit." Tang Yulou looked at it for a while before he said out loud.

"These ancients are crazy, right, so many people have chrysalis, there must be hundreds, right?" Hu Fei frowned, this made him even more frightened than the battlefield he had experienced.

"The society of slavery is like this, and according to this scale, it can be seen that the identity of the master of this underground palace is definitely not simple." Zhang He saw these but was peaceful, the princes and generals of the past dynasties, most of the time they were buried after death, they would be buried with living people, especially the ancient slave system, those slaves could not be called people for these people, maybe the value of a person was not as good as a horse or even a sheep at that time.

"The evil feudal society." Yu Feng shook his head, and couldn't help but feel some sympathy for these chrysalis.

"Let's go." Xia Yanru should be the most calm one, although it is cruel to be buried with a living person, but these are caused by the social form at that time, they live in an era of equality and harmony, and they can't understand these inhumane behaviors.

Everyone packed up their mood and silently followed behind Xia Yanru, after coming out of this suspected burial pit, it was like entering a natural stone cave cave, full of uneven stones, and I don't know how long I went around, the space was open for a while, and it was narrow enough to pass sideways.

"It's just a bit of a difficult road, and it would be fun if you met those burial beetles you ran into last time." Yu Feng sweated while walking, it was obviously very cool in this underground palace, but after walking for so long, people were tired and hot.

"You miss them?" Tu Hongxing was angry like Yu Feng, this stone cave is difficult enough to walk, and he wants to have some friends, do you think they have too long a life?

"No, that's what I said." Yu Feng waved his hand again and again, he just said it, if he really met, he would definitely cry.

"Wait, look, isn't there a spider?" Hu Fei is a pioneer, his eyes are the best, and at a glance he can see what is coiled on the stone wall not far away, about the size of an adult's fist, and he is red.

"This is an oil spider, right? The torso is as red as vermilion, the eight legs are black-brown, and the abdomen is whitish. Zhang He squinted his eyes and looked closely, and asked with some uncertainty.

"Oil spider is highly poisonous, everyone be careful!" Tang Yulou nervously took out his weapon, if this is really an oil spider, then you really have to be careful, if you don't pay attention, you will die.

"Damn, I know, you crow's mouth." Tu Hongxing slapped his head, and he almost forgot Yu Feng's crow's mouth attribute.

"There's one over there, too!" Wu Lian pointed to the left front and shouted.

"It's all over here!" The inch-headed man also became nervous.

"Hey, didn't we go to a spider cave?" Yu Feng scolded.

"Shut up!" Tu Hongxing yelled violently.

With Tu Hongxing's roar, those oil spiders seemed to be awakened, and in just a second, they continued to crawl out from four directions, and one was as big as a fist, and even bigger than a fist.

"This is too abnormal, we didn't see spider silk all the way over, why did so many spiders suddenly appear?" Hu Fei held the gun in his hand and whispered.

"This oil spider does not spit silk, or rather, what they spit out cannot be called silk, but a liquid, highly poisonous, and once the skin is stained with this liquid, it will fester." Zhang He explained.

"Then what should we do, these oil spiders seem to be planning to outflank us!" Wu Lian asked.

"Break through from the right." Xia Yanru quickly made a judgment.

Everyone also saw that the number of oil spiders on the right side seemed to be smaller, and as Xia Yanru gave an order, they quickly ran towards the right, and the oil spiders around them also instantly accelerated and crawled towards them.

Xia Yanru and Hu Fei opened the way, one with a gun and the other with a long whip, both of which were long-range attack weapons, and the others were also armed with guns, and those who didn't grab them were armed with daggers or other weapons.

Hu Fei, who has always been known as a sharpshooter, almost hit the target with a gun, and Xia Yanru, who had an explosive force value by his side, forced those oil spiders not to dare to get close.

(End of chapter)