Yuri drew a spiral circle under Baikal at an astonishing speed, and Liu Weiping, who followed behind, kept calculating the location of the descent on the contour map, while he followed Yuri's intermittent sampling to obtain images and components of underground rock debris to match the memory data he obtained at the bottom of Lake Baikal as much as possible, but the whole week passed, and Yuri, who had infinite power, had drilled to his extreme depth, and the result was still nothing.

At more than 10,000 meters underground, the two of them have been unable to establish effective communication with Han Bingbin on the ground, although Yuri is paid by the hour, but Noah Brisk promised him a large additional bounty after excavating the alien spacecraft, so Yuri finally asked Liu Weiping, "Professor, did you remember the wrong location?" ”

"You shouldn't be wrong, we have enough momentum to try to expand the scope of the excavation."

So Yuri had to build a new map, drawing a larger spiral in the Baikal region. But at this moment, Liu Weiping has begun to doubt his own judgment, although he asked Yuri to continue to expand the range of excavation in the shared bus, he is also calculating other possibilities.

By the fortieth day, in addition to the horizontal spiral, Yuri had also drawn a circle of spirals in the vertical direction, and from the ground Han Bingbin's prospecting vehicle, the trajectory of the underground Yuri was like a three-dimensional network that densely cut the entire Baikal underground densely, forming a small area of 500 meters square. Every time Yuri approaches the surface, he sends the underground sampling data to Han Bingbin, so the underground address structure in Han Bingbin's host is meticulous, but there is no trace of superconducting alloy.

Zhao Yonggang, who had been in contact with the scene in Clifford Square, kept lowering the probability of the final outcome, and as the numbers got closer to zero, he had to consider Noahbrisk's plan to go bankrupt.

Liu Weiping, like Zhao Yonggang, was aware of the severity of the situation, and he checked the geological structures he had collected over and over again, and all the fault pictures did not match the images he obtained in the cracks at the bottom of the lake, maybe the Siberian crust had been completely distorted by the squeezing, but Yuri had moved twenty kilometers eastward, what was the problem.

"Yuri, shall we try upward?" Seeing Yuri spare a circle and return to the middle of the horizontal spiral, Liu Weiping vetoed Yuri's route to the east.

"Up?" Yuri slowed down the speed of the power cutter head, "Didn't we dig the area above?" ”

"No, we're ignoring the above horizon." "We should try the main Baikal peak at an altitude of 6,000 meters. ”

"The main Baikal peak? Could it be that an alien spaceship was washed up on it by a volcano? Yuri was skeptical, but he increased the motor anyway, and it was easy to work again along the excavated vertical line, and the soft rubble that had been excavated was extremely easy, but in the course of more than an hour, Yuri had already crossed the horizon diagonally and entered the dense Baikal main peak.

The main Baikal peak is covered with hard basalt, and no matter how strong the power cutter head is, it can't withstand the high-intensity continuous operation, and it can't help but gradually slow down. "It's not like this, it shouldn't be like this." Liu Weiping was desperate again, he clearly remembered that he had discovered the anti-gravity superconducting spacecraft after passing through a dark river formed by a long underground lava cave.

Suddenly, Yuri sped up, and unlike the previous large and small pieces of rubble, large and small pieces of debris passed through Liu Weiping's pipe, and the host in charge of analysis in the pipeline had already transmitted the data to Yuri and Liu Weiping, "It turned out to be fused tuff, no wonder the excavation was so easy." Then he saw that the pipes were accompanied by broken stones, and there was broken powder everywhere, "Stop, stop." Under Liu Weiping's call, Yuri slowly stopped the power cutter head, and under the strong light behind the cutter head, the two people obtained the previous image, and saw that the rocks were full of bubble-like structures, and the cavities of these bubble structures still retained lava-like condensations.

"That's right! We've come to the right place! Liu Weiping suddenly had a new hope, "Yuri, this is the legacy of the earthquake at the mouth of the Seleng River decades ago, which was brought out when Lake Baikal was raised, and I saw this structure when it fell into the slit at the bottom of the lake, and we may be able to harvest by digging up along such a structure." ”

Hearing Liu Weiping say this, Yuri hurriedly increased his horsepower and excavated forward along the bubble belt in these rocks, compared with the hard basalt, the loose fused tuff resistance is much smaller, and the weight of two people of hundreds of tons was pulled by the power cutter head, and they climbed briskly all the way. It didn't take long for the speed of the two people to slow down again, and there was only the sound of the rumbling idling of the power cutter head, and Liu Weiping suddenly lost the momentum to move forward.

"Professor, we're in the hollow and can't move forward." It turned out that Yuri dug too hard, he broke through the stone wall and entered a huge hollow, the power cutter head did not have the reaction force of the rock, and the two people were trapped in the open space of the cave and could not move, Liu Weiping looked at the altitude data, it was already 4800 meters above sea level, and he was about to rush to the top of Baikal Peak.

Han Bingbin, who was waiting day and night on the ground, had already obtained the position of two people, and before Yuri ran aground, he had actually detected the hollow area on the top of the mountain, but he had no way to warn Yuri, so he could only watch the two hollows combine from the sound wave detector.

However, this is not difficult for Han Bingbin, the nearby large and small survey stations have resources that can be deployed, and the depth of 1200 meters is a piece of cake for Noahbrisk, and soon, the transport airship hoisted the drilling equipment to the sky above Baikal. Even in the summer, the 6,000-meter-high Baikal is covered with snow all year round, and it would be impossible to do it without the location of acoustic detectors.

Han Bingbin also followed the airship to Baikal Peak, he had descended to the ice peak, commanding large and small drilling robots to set up drilling rigs on the ice peak, underground drilling is the strength of Noah Brisk Company, with a drill pipe continued, the drill bit broke through the ice, through the rock, all the way down, and after a night brought a cable robot to the cavity area where Liu Weiping was.

The cable robot fell to the ground and connected to the communication module between him and Liu Weiping along Yuri's continuous handshake signal, and the moment the communication was restored, Zhao Yonggang hurriedly asked, "Professor, is there a new discovery underground?" ”

Liu Weiping and Yuri knew that they had been rescued, the two of them stopped the swing of their bodies and quieted down, Liu Weiping replied, "Yonggang, I dare to conclude that the cave that stranded us is part of the alien spaceship I encountered at the bottom of Lake Baikal, and it has been brought to the summit of the surface somewhere in geological changes, and we are still exploring underground and got the wrong direction. ”

"If it's sure to be in the surface rock formation, we don't have to go underground, and with the gravitational and magnetometer on the drone, we can find the possible area of the alien spacecraft." Han Bingbin also joined the discussion through a communication cable.

"Then let's get moving!" Zhao Yonggang was extremely anxious, and he couldn't imagine that the forty-day recovery of mountains and rivers would finally be bright.

"Let's move our data out of here, we don't want to be stuck here." Liu Weiping and Yuri said urgently.