According to the order of the Hantang Headquarters Group, the Chinese Pioneer Army working team in the Shangbo area sent an investigation team to the South American Tunnel on the border between Ecuador and Peru to conduct a scientific investigation.

Among the expedition members, An Yun led the team, including Li Yi (operational commander), Li Dan (military doctor), Meng Xiaohui (technical investigation), Wang Bo (technical), Yang Hao (escort) and other 48 members, including 36 marines (8 people), and 12 people in the whole team.

On November 28, 1876, the procession began. The necessary weapons and equipment were set aside, as well as equipment for field expeditions and survival. There are also 24 horses and about 2 tons of food supplies, enough for 48 people to survive for 45 days.

On the afternoon of 3 December, the team had arrived at a recess in the mountain 15 kilometers near the destination, prepared to rest for a day, and sent an eight-member reconnaissance team.

An Yun was about to see Li Yi, Li Yi had just come back from reconnaissance, and the camouflage suit on his body had not yet detached.

"We used Jing Weiyi, a measuring instrument, to measure the exact position."

Speaking of theodolite, it is still about skills.

When measuring, the theodolite is placed on a tripod, the center of the instrument is aligned with the ground measuring station with a vertical ball or optical pointer, the instrument is leveled with a level, the telescope is aimed at the measurement target, and the horizontal angle and vertical angle are measured with a horizontal dial and a vertical dial. According to the accuracy, it is divided into precision theodolite and ordinary theodolite; According to the reading equipment, it can be divided into optical theodolite and vernier theodolite; According to the shaft structure, it is divided into a double theodolite and a direction theodolite. In addition, there are coded dial theodolite that can automatically record dial readings by coded perforation; an automatic tracking theodolite with continuous automatic aiming at air targets; a gyro-theodolite and a laser theodolite that use the gyro-oriented principle to quickly and independently determine the orientation of ground points; It is an all-round theodolite for astronomical observation with three functions: theodolite, meridian and zenith; Combining a camera with a theodolite for photographic theodolite for terrestrial photogrammetry, etc.

Early the next morning, five men were left to guard the equipment and food for the horses, and improvised protective measures were built around a cave to establish a supply point. The other 43 members of the team began to hike towards their destination.

An Yun and Li Dan looked at the cave that Li Yi and they found, and some couldn't believe it.

"So, is this really the entrance to the tunnel we're looking for?" This cave is only 3 meters wide, 1.5 meters high, 17.9 kilometers long, and there is a 10,000-square-meter hall after the entrance? Li Dan was skeptical.

Meng Xiaohui carefully looked at the soil inside and outside the cave, and said affirmatively: "Obviously, there has been a mudslide or landslide here at the entrance of the cave!" Blocked the original hole! ”

Facts have proved that what Meng Xiaohui said is correct, explore and bend down to drill into the hole, after drilling three meters, the cave is impressively cheerful, the height of the cave rises to more than 7, 8 and a half, the width varies from 3 to 5 meters, and after walking for 5 minutes and 200 meters After the corridor, a hall of several thousand square meters suddenly appeared, one connected to one, full of 8, each with the smallest tennis court and the largest three areas are the size of a football field.

The most surprising thing is that there are six 4-meter-wide and 2-meter-high door-and-window light vents on the east and west sides of the top of the eight halls, which illuminate the hall brighter than when it is dark and cloudy outside.

It's really remarkable, and obviously these halls have undergone traces of artificial construction, all kinds of stone platforms, stone beds, stone stoves, stone tables, stools, and various hieroglyphs or murals, and the scenes of life are vivid.

Meng Xiaohui also found a ceramic bowl, large and small, covered with soil, but the pattern on it is very beautiful, with a light red, maybe the color of the clay is colored.

Near these halls, the recent expedition team members have spent more than two hours, and there are a lot of clutter, but many things have been weathered. In particular, clothing, bamboo and wood products, or have been bitten by insects and ants, and are in tatters.

After about 8 kilometers of investigation, the explorer team decided to start resting, and they were allowed to eat and rest for half a day, after all, the terrain in the cave was still relatively complicated, and they had to use colored cloth strips to nail into the cave wall along the way to make marks, and the progress of the work was slow.

Li Dan looked at Meng Xiaohui looking at the tablet, "What are you doing?" ”

Meng Xiaohui replied casually: "Look at the 9527 forum!" ”

"What? Is there a network here? ”

Meng Xiaohui explained: "This is not instant information, it was transmitted to the base host three days ago, and it was only transmitted to the digital receiver we carried today, and I can open the mailbox within 500 meters of this tablet!" ”

"Oh, I said yes, I thought we were back in time!" Li Dan and Xiaohui also watched the forum.

[Top Post]: Reminiscing about the classic lines and buzzwords, proving that we are traversers!

Leng Bingbing: The concubine can't do it! The concubine can't do it!

Hanhan: There's nothing in the world that can't be solved by a barbecue. If there is, then two.

Little girl: Actually, I refused at first.

Afraid of falling to the ground: Boy, do you crave power? We a

e Tired of logging!

Little Fish: You're standing in the champion position, and I'll help you buy a few oranges.

Vivi: You're awesome, then. The other person doesn't want to talk to you and throws a dog at you.

Meng Xiaohui: "It's like we've gone home!" ”

Li Dan: "Our home is under construction!" ”

Sister Yanzi: Recently, there have been rumors that I like you, and I want to clarify that it is not a rumor.

Fang Fang: When are you busy marrying me?

Zhenzhen: There was once a sincere love in front of me, but I didn't cherish it, and I regretted it when I lost it.

Knife: Is it my fault that I am rich and handsome?

Maple Grove: Are you hungry? I'll give it to you below.

Shanshan: Chatting with you is like taking an exam, and in hindsight I always feel like I didn't perform well.

Then there was a voice

"Everyone, pack your things and get ready to move on!"

Obviously, it was Captain Anyun who gave the order!

Let's go, Li Dan and Meng Xiaohui took their luggage and followed the team.

After walking for about an hour, the team stopped, and Li Dan Xiaohui was notified to go to the meeting.

"Okay, the 8 main leaders are here, the new situation introduced by Li Yi!" An Yun presided over the first speech.

Li Yi: "I don't know what to say about this today?" In the afternoon, when you were resting, I took two team members to reconnoiter in the cave, when we walked 10 kilometers and the soldiers were divided into three roads and three forks in the road to detect, Yang Hao and I have returned, but Li Jian has not returned, it has been 1 hour and 50 minutes. ”

An Yun: "Let's not talk about anything else, Li Yi, you turn on the projection and let everyone watch the video"

The video opens, travels along the cave, and after a few minutes out of the cave, oh! The seaside, unexpectedly to the beach, the camera turned to the distance, the harbor, zoomed in, oh oh oh, red flag, five-star red flag!

Meng Xiaohui said: "What kind of place is this?" ”

Li Yi: "It's obviously Dahan City, the southeast corner of Isabella Island!" ”

The crowd was silent!

It seems that the breathing has stopped!

An Yun didn't speak, and continued to play the video.

Soon after the second video gave birth to the entrance to the cave, I saw the town, there were a lot of wooden houses, a bit like a tropical place, and there were a lot of people.

Yang Hao spoke at this time: "This is the capital of the South China Administrative Region of Luzon Island, Phoenix, and I have been there for a year and a half. ”

The crowd was quiet again!

What shocking secrets are hidden in the South American Tunnel!

Will Li Jian come back? Will he bring back the news of the change!