And so on, for several days.

The questions hidden inside the metal door cover not only all disciplines, but also a wide range of problems for each discipline: from basic theoretical knowledge to speculation in cutting-edge, cutting-edge fields.

The scientists who were able to enter this scientific expedition team are all outstanding talents with profound knowledge and solid basic knowledge. Even if it's not a subject they're good at, they can still give accurate answers to basic questions.

But those problems in cutting-edge and cutting-edge fields are not so easy to solve.

After Liming learned of this situation, he asked Luo Yun to stay here to protect the scientists, and he took a team of soldiers and cultivators from the Security Bureau back to the front-line base located outside the crack, and reported their findings and problems through the communication equipment of the front-line base.

The high-level attaches great importance to the development of the relics of prehistoric civilization.

After receiving the news from Liming, they immediately contacted a group of experts and professors who were top in various disciplines and fields, and asked them to bring the required equipment, and under the arrangement and escort of the military, they came to the depths of the Great Snow Mountain, and then Liming and others escorted them through the karst cave under the crack in the ground to the mysterious metal gate.

After Luo Yun destroyed the black shadow, the beast, and the fierce beasts and monsters such as Xiangliu, the safety factor in the cave was greatly improved, and if there was occasional danger, Dawn and others could also deal with it. Therefore, these scientists who were reinforced, all along the way, were in danger.

Arriving at the metal gate, they saw not only the humble makeshift camp, their fellow scientists who were almost frantically answering questions, but also the huge, magnificent metal door!

This metal door resembles a dam towering into the sky.

Human beings are very small in front of it.

With the arrival of reinforcements of scientists, the scale of the temporary camp has also expanded, although the conditions are relatively simple, but the scientists who have come here do not care.

In their eyes, there are only those discipline problems.

In order to solve these problems, they forgot everything else.

Although several days have passed, there seems to be no great danger in the cave, but Luo Yun has not left.

He also wanted to know what was stored in the remains of a prehistoric civilization behind the metal gate.

At the same time, he chose to stay, also to guard against dangers such as traps or fierce beasts and demons behind the metal gate.

With Luo Yun here, even if there is danger hidden in the ruins of prehistoric civilization, he can control the situation. The worst can also minimize casualties.

Finally, after many scientists, months of discussion and calculation, the problems hidden in the metal door were solved one by one.

In the process of solving these problems, all the scientists involved feel that they have benefited a lot.

Not to mention the basic questions, those problems in cutting-edge and cutting-edge fields have opened the eyes of scientists and increased their knowledge.

But what surprised them the most was that these questions, which seemed to them to be very cutting-edge and cutting-edge, were very basic questions in the eyes of the survivors of prehistoric civilizations, just like Newton's three laws.

This makes scientists look forward to the scientific and technological level of prehistoric civilizations.

Also looking forward to it are Luo Yun and Liming and others.

When the answers to all the questions were solved, the scientists cheered excitedly as if they had won a big battle. But soon, they ran into a new problem.

Now that the puzzle in the metal door is solved, how do you write the answer on the test paper?

Luo Yun stood up at this time and said, "Give me the answer you have solved." ”

With the answers to the questions collected by the scientists, he walked to the grand metal gate, holding a manuscript paper full of complex formulas and numbers in one hand, and sticking it to the metal gate with the other.

As the spiritual power turned, wisps of golden light bloomed out from the metal gate, enveloping Luo Yun in it, and then people saw that the thick stack of manuscript paper in Luo Yun's hand actually disintegrated into a spot of light under the action of golden light.

Just when they were shocked, thinking that the results of their hard calculations had been destroyed, they saw those spots of light circling and flying around Luo Yun, turning into formulas, numbers, and words......

And that's the answer they put down on paper!

Immediately afterward, it turned into a speck of light that turned into words, and along with the golden light, it entered the metal gate.

Luo Yun withdrew his hand attached to the metal gate and took a few steps back.

The people gathered in front of the metal gate all held their breath, nervous and expectant, waiting for the gate to open.

However, a minute passed, and the metal gate was unresponsive.

Two minutes passed, and there was still no movement.

Three-minute ......

Five minutes......

In the blink of an eye, more than ten minutes passed, and the metal door still did not open.

In such a situation, people could no longer remain calm and couldn't help but whisper.

"Why didn't the door open? What went wrong? ”

"No, we have checked and calculated all the problems, and it is impossible to make mistakes."

"Could it be that we were wrong from the beginning, and the answers to these questions are not the password to open the door at all?"

"If these questions are not the combination lock that opens this door, then how do you open it?"

The voices of the people were getting louder and louder, and by the end, the whole cave was buzzing.

Liming and Chi Tian couldn't help it, and after glancing at each other, Chi Tian opened his mouth and asked, "Luo Shangxian, what's going on?" ”

Luo Yun smiled: "Don't worry, wait for it to calculate for a while." ”

"Huh?" When Liming and Chi Tian heard this, they were stunned.

"This door, no one has been here for tens of millions of years, and the response is a little slow, which is understandable, right?" Luo Yundao.

A few months ago, when he first probed his spirit into the metal door, he found that the machine spirit in the door, or the intelligent program, was a little slow. At the same time, he also discovered that the remains of this prehistoric civilization are different from the No. 1 laboratory in Kunlun Mountain.

The No. 1 laboratory in the Kunlun Mountains is always in operation, even before the birth of human beings, there are species born in other laboratories, maintaining the laboratory and operating the laboratory.

But this relic of a prehistoric civilization hidden in the depths of the Great Snow Mountain has been there for tens of millions of years, and no one has ever visited.

Although this metal gate has always fulfilled its duty to protect the remains of prehistoric civilization, it is not surprising that its reaction will be sluggish and aging.

After listening to Luo Yun's explanation, everyone could only suppress the suspicion in their hearts and continue to wait.

After another twenty minutes or so, there was a sudden clattering sound in the metal gate.

"It's going to open the door!?"

The people's spirits lifted, their eyes widened, and they stared at the metal gate for fear of missing a scene that would likely be recorded in human history.

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