Angfeng hugged Qi Junyi all of a sudden, "The third child!" Is this what it means? Lu Anfeng asked in disbelief. The first path has been solved, but don't forget that Qin Kai said that he set up three layers of shackles inside. Qi Junyi said.

"Don't hit us yet, now we have a third hope. But boss, why is Bei Xin so powerful, this is Chongyi's question. O great god! Lu Anfeng still can't believe it.

"She studied computer science in college." Gu Yancheng only said one sentence and continued to look at Bei Xin to solve the second question. "No wonder the logic and arithmetic are so good, presumably the sister-in-law is programming those codes." Lu Anfeng joked. "It's possible for you to guess." Qi Junyi felt that what Lu Anfeng said also made sense.

It was already dawn when Bei Xin solved the second way, and although he couldn't see the time in the secret cave, Bei Xin already felt that it had taken a long time. After not eating or drinking for nearly a day, Gu Lao and Gu's mother were already very pale, and Gu Xinbo and Bei Xin were no better.

The four of them didn't expect that there would be a third wall, and they felt that even if they could solve it, there would be endless problems, and they would not be able to get out by then. "Xin'er, don't solve it anymore, you're very glad that you have this ability. But you've stayed up all night, so stay with your grandmother in the few hours you have left. Seeing you like this, grandma feels distressed. Gu Lao rubbed the weakness of the authentic.

At this time, Bei Xin was also very uncomfortable, she knew that the second one was much more difficult than the first, and the next one would definitely take longer than the second one. The physical and mental torture had made her want to fall, but she really didn't want to give up. "Grandma, I want to try again, if it doesn't work this time, I'll give up, okay?" Gu Lao nodded.

"Little sister-in-law, don't give up! There is only one question left. Lu Anfeng looked at the situation on the screen and said anxiously. Gu Yancheng and they all knew that as long as they broke the last layer of code, they would be able to come out, but inside Bei Xin they didn't know how many codes would be waiting for them.

When Bei Xin pressed the opening seal of the third question, the picture of Gu Lao and them reflected outside the stone wall disappeared, and it was also transformed into a military code map.

"Cheng, is this what you mean?" Qi Junyi pointed to the screen and said. Gu Yancheng quickly solved it, because in the process of watching Bei Xin's solution, Gu Yancheng felt that he wanted to jump out of the method he had learned in the army before and use mathematics to solve it.

"Cheng, what kind of method are you using, why haven't you seen it?" Lu Anfeng looked at Gu Yancheng in the solution, which was a solution he had never seen in the army.

"Didn't you see that Bei Hin didn't solve it by military methods?" Qi Junyi replied. "If I'm not mistaken, Bei Xin guessed Chongyu's key. Looking at her solutions to the first two problems, she should be able to solve them by zeroing everything in. Gu Yancheng replied.

"But there are many ways to get to zero, maybe a thousand. But the probability is 100 billion, and the solutions that Bei Xin found just now are almost the fastest. But it's not that easy, and some people can't solve it in their lifetime. Gu Yancheng continued.

"It took almost a day for the two before that, so does Bei Xin still have the mental strength to solve it?" Qi Junyi said worriedly.

As soon as Qi Junyi finished speaking, Gu Yancheng was solved. Lu Anfeng and Qi Junyi both looked at Gu Yancheng in surprise, "Are you a genius!" ”

Qi Junyi said to Lu Anfeng: "Have you forgotten that the mathematics of the city is at the level of a great god? Lu Anfeng nodded, "This is also, the professor in college is not your opponent." I didn't expect it! Chong Yi was also defeated by you. ”

After Gu Yancheng cracked the code, the screen re-showed the situation of Bei Xin and the others in the secret cave. The problem that Bei Xin was solving was just the opposite of Gu Yancheng's code.

"Cheng, can you solve it so quickly, does it mean that Bei Xin will be able to do this level soon?" Lu Anfeng asked. "Either it can be cracked in half an hour if you find the same method as me, or it may be a long, long time, or you can't find it." Gu Yancheng stared at the screen and replied.

"Cheng, is your method of decoding related to Euler's identity?" Qi Junyi asked. Gu Yancheng nodded. They all know that there are not many people who know this method, and they have to use it skillfully to solve the problem quickly. But for a female college student who just graduated from G University, this can be a real problem.

The light on the screen was reflected in Gu Yancheng's eyes, and they seemed to see Gu Yancheng's firm gaze looking at Bei Xin, and he believed that Bei Xin would definitely be able to save his grandmother and them.

Sure enough, Béshin burst open, combined with Euler's identity, the code was unraveled, and the stone wall shattered.

Gu Yancheng hurriedly ran in and hugged Gu Lao and them, "I'm sorry!" Grandma, it's my fault that made you suffer. Then Gu Yancheng hurriedly asked Lu Anfeng and Qi Junyi to arrange personnel to take Gu Lao and them to the hospital.

Gu Yancheng turned around and approached Bei Xin, Bei Xin had never seen such a sloppy Gu Yancheng, you can imagine how broken his mood was just now.

The two looked at each other, and Beshing's cheeks gradually became wet with tears, brushing over the gray marks. Gu Yancheng reached out to wipe the dust off Bei Xin's face, grabbed Bei Xin's face and kissed it.

Gu Yancheng kissed Bei Xin deeply, and Bei Xin gradually lost his color from surprise at the beginning. She was so tired that she gradually narrowed her eyes. Gu Yancheng felt that the person in his arms instantly lost his strength, and looked worriedly, fortunately he fell asleep.

Gu Yancheng kissed Bei Xin's forehead, "Thank you!" From now on, I will protect you! He then took Peshing to the hospital.

--- Meihito Hospital---

Several nurses pushed the patient past them urgently, and Gu Yancheng's eyes moved with the bed. Zhou Xingren patted Gu Yancheng's shoulder and said, "Cheng, don't worry!" Gu Lao and the others are all hungry and faint, give them some nutrient solution and they will be fine. It's you, your injuries aren't healed yet, hurry up and give me back to rest! ”

"You are used to seeing the life and death of so many people every day, are you already very indifferent? I used to be too. There's never been anything that scares me, but I really got scared this time. Gu Yancheng said.

Zhou Xingren has known Gu Yancheng for so many years, and it is the first time to see him like this. In the past, Gu Yancheng existed as a cold and indifferent god, but this was the first time he felt that Gu Yancheng was also an ordinary person.

"Here I see too many life and death partings every day, some people have some things that must be done quickly, cherish the people in front of them!" Zhou Xingren said.

Because it was already late at night, Gu Yancheng went to the ward to see Gu Lao and they went home to rest, and asked Chen's mother to prepare food for Gu Lao and them the next morning.

Pehin woke up at five o'clock. What had happened before seemed like a dream, but she opened her eyes to the strange environment. In the white ward, Bei Xin knew that everything was real, and he seemed to have just returned from the door of death.