Gu Fengchun smiled, knowing that he couldn't beat Chen Si, so he had to shrug his shoulders and retreat back. The people behind him were already waiting impatiently, and most of them were soldiers of the Mi people. However, they did not dare to cause trouble as before, and tried their best to restrain their emotions. Two of their companions had already died tragically in this place without even realizing it, and they didn't dare to make a mistake.

Chen Si took a deep breath, followed the prompts on the wall, and slowly walked over. He was full of power, and if he noticed something wrong, he would return as fast as he could.

Fortunately, he didn't notice anything wrong as he walked along this path, and he walked safely to the other side of the passage. At this point, there was already the end of a dead end in front of him. No passage was found.

And when Chen Sizheng was wondering, his ears heard a slight "click" sound, which was the sound of the machine running! As soon as Chen Si's face changed, he felt his feet sink down, and he almost couldn't stand steadily. His heart was beating faster, and his scalp was tingling. All that came to mind was clusters of arrows shot out of those small holes, nailing him into the shape of a hedgehog. At this point, it's impossible to escape! Chen Si quickly looked around, looking for a safe place to hide.

The sound of "click......" became louder and louder, but there was no scene of random arrows flying wildly as Chen Si imagined. After a while, a square piece of gray metal slowly protruded from the copper wall in front of him.

The uneasiness in Chen Si's heart suddenly disappeared. He looked at the metal block and found that there were eight wheels on it, and there were some engraved symbols on the wheels, and the engraved symbols on each wheel were the same, Chen Si judged at a glance that the engraved symbols on the wheels represented ten numbers of 0~9. It's a combination lock! Chen Si couldn't laugh or cry a little. He also knew that this combination lock had become a big obstacle in his way, and if he couldn't figure out the password, not only would he not be able to move forward, but he would also be unable to retreat.

"Feng Chun, come here!" Chen Si took a deep breath and shouted at Gu Fengchun when he turned around.

One person counts short, two counts long. He knew that the password of this combination lock was probably related to the last sentence on the wall, "It is not a good thing", but he couldn't figure out what it had to do with this password when he had time. However, Gu Fengchun has a lot of experience in the study of Zhou Yi, and with him on the side, he may be able to come up with the answer.

Gu Fengchun heard Chen Si calling him, and hurriedly walked over, he knew that Chen Si didn't have anything very important, and he wouldn't let him be there in this situation. "Keep an eye on the ground and follow the instructions on there." Chen Si did not forget to remind Gu Fengchun to pay attention to safety.

Gu Fengchun naturally didn't ignore the prompts on the wall, and walked to Chen Si's side tremblingly, and asked, "What's the matter?" ”

Chen Si pointed to the protruding cipher wheel and said, "Look, a cipher is needed here." But I don't know what the password is. ”

Seeing Chen Si's frowning, Gu Fengchun suddenly groaned, and he said: "This password should be related to the last sentence, we should start from that sentence." ”

"Yes, that's what I thought, that's why I called you over." Chen Si saw that Gu Fengchun had followed his train of thought, and his tightly knit brows stretched a lot.

"Did you notice, there are eight cipher wheels here." Gu Fengchun pointed to the prominent metal wheel and said.

"Isn't that nonsense?" Chen Si glanced at Gu Fengchun.

"Listen to me first, these eight wheels, that means, you need to enter eight numbers here to open here." Gu Fengchun continued.

"Yes, I understand this, pick the key one." Chen Si was a little excited in his heart, and it could be seen that Gu Fengchun already had a little idea in this regard.

Look at the last sentence on the wall again. It is not enough to help Ge Ding. When Gu Fengchun said at the end, his tone suddenly became heavier: "Haven't you noticed that there are four hexagrams in "Zhou Yi" here?" ”

"Hmm" Chen Si stopped answering and quietly listened to Gu Fengchun's analysis. "In Zhou Yi, there are sixty-four hexagrams, and the position of each hexagram has a certain order, that is, each hexagram has a corresponding number. And coincidentally, among the four hexagrams of Jiji, Weiji, Ge and Ding, they are all ten-digit, and there are eight of them in total. Gu Fengchun is worthy of being a skilled master of studying "Zhou Yi", and he saw through the mystery at once.

"Not bad!" After listening to Gu Fengchun's explanation, Chen Siyi slapped his thigh and said, "It should be like this." ”

Gu Fengchun continued: "Jiji is sixty-three hexagrams, Weiji is sixty-four hexagrams, Ge is forty-nine, and Ding is fifty, so I think the password of this group is 63644950." Gu Fengchun obviously memorized Zhou Yi's content like a stream, and he didn't even think much about it, so he reported the data proficiently.

Chen Si nodded. Immediately turn the cipher wheel. However, the cipher wheel seems to have been eaten by rust, and it is very difficult to turn it. Gu Fengchun wanted to help, but was stopped by Chen Si, who was well versed in the mysteries of the mechanism, and knew that once the cipher wheel was turned, it could not be stopped, and once it stopped, the consequences would be unimaginable. He took a deep breath and twisted the data on the wheel with all his might, and it took him about ten minutes to adjust the data on the eight wheels. After turning all the passwords and aligning them with an engraved character, Chen Si let out a breath of turbidity. His hands were already red. Obviously, it took a lot of effort. Whenever he finished turning a piece of data, he heard a "click" sound coming from behind the surrounding copper wall, which scared Gu Fengchun next to him half to death. Gu Fengchun's hands were clenched tightly, and his palms were already full of sweat. Chen Si could hear from the sound of the machine, this was the sound of the mechanism matching, obviously this password was correct.

"It worked." Chen Si said with relief. But Gu Fengchun turned his head to look around, but he didn't find any reaction.

"Ouch......" Before Gu Fengchun came back to his senses, he suddenly found that his feet were empty, and the whole person fell downward! Chen Si beside him didn't seem to be having a good time, and like Gu Fengchun, he fell down.

"Feng Chun, pay attention!" Chen Si found that his body was falling, but he was not slightly flustered like Gu Fengchun, but pushed Gu Fengchun hard against the wall next to him!