It turns out that the meaning of the upgraded version of the abandoned tunnel exploration mission is like this, Han Du thought it was upgraded all at once at first, but now it seems that after the mission is opened, the task will be upgraded little by little, which means that the later it is completed, the more difficult the task will be.

Now that the task has already been upgraded little by little, I don't know how far it has escalated, Han Du didn't think much about it, put on the rain boots from last time, brought a strong flashlight, and immediately locked the door and set off, rushing to the abandoned tunnel in the northern suburbs of Guqing City, and the leopard was left at home by him to sleep.

He quickly arrived here on a shared bicycle, hid the bike in the grass by the roadside, and then walked to the roadside field by himself.

Familiar with the way, Han Du walked through a piece of grass, and when he arrived at the entrance of the abandoned tunnel, it was still black and pressed, and the water inside and the traces left at the entrance of the cave could be seen at the entrance of the cave.

He took out card 4 again and read the contents on the back carefully: "Return to the abandoned tunnel on the northern outskirts of Guqing City, use this card, you will get an upgraded version of the abandoned tunnel exploration mission, where it will become fantastic and unpredictable, enter it, feel the time lapse, and listen to the voices of the people of that era." ”

Looking at this description, Han Du thinks that the mission scene should be in the early days of the founding of the People's Republic of China, can it still be a time trip back and return to that passionate era?

In the end, just try it to find out, Han Du picked up the card and threw it directly into the tunnel. He was also trying to do so, and he didn't know how to use the card.

When the piece of jam fell on the stagnant water at the entrance of the cave, a magical scene happened, a trace of essence burst out from it, followed by the light, the light was great, the inside and outside of the tunnel were distorted and changed, Han Du's vision was completely blurred, and he couldn't distinguish anything clearly.

After about ten seconds, the scene in front of Han Du's eyes finally became clear, and to his surprise, the surrounding situation changed drastically.

In front of him, the mouth of the tunnel was still there, but it was obvious that the tunnel had been dug not long ago, and there were many new traces of mechanical equipment on it, and behind him, there was no grass, and there used to be a forest here, because of the tunnel, the trees were cut down, and there were transport trucks driving on it.

Han Du looked carefully and found that the trucks were carrying excavated gravel, but the strange thing was that these cars had been circling around the scene and had no sign of leaving here.

This seemed very strange, Han Du was about to go over and ask, before he took a step, and immediately retracted his steps, because he suddenly found that there was no one on those transports that were spinning in circles.

"Is it a ghost car?"

Han Du's hands unconsciously broke out in a cold sweat, but now it is obviously daytime, the sun is shining in the sky, what is going on with these ghost cars? Aren't ghosts afraid of sunlight?

Han Du even felt that it was the mission card that really brought him back to the early days of the founding of the People's Republic of China, but he could clearly locate the location here through the positioning of his mobile phone, and the signal of the mobile phone card was also full.

This shows that he has not returned to the early days of the founding of the People's Republic of China, and he is still in the abandoned tunnel, and all this in front of him should be an illusion created by the mission card.

At this moment, inside the tunnel, there was a sudden sound of knocking and the roar of machinery, as if there were workers working inside.

Han Du immediately stepped in, and if he wanted to complete the task, he must enter the tunnel.

With a snap, when he landed with one foot, he felt that there was water under his feet, and the water seeped out from the excavated stone wall, but fortunately, Han Du wore rain boots.

There's also light in there, and it's very faint. In the early days of the founding of the People's Republic of China, there was a shortage of electricity everywhere in the country, and many rural areas did not use electricity until more than nine years, so it is extremely rare to have such a little light here.

He turned on his bright flashlight and walked into the depths of the tunnel with stagnant water, when a line of green light suddenly appeared in front of his eyes, just like that.

"The latest upgrade scenario is on, and the system automatically upgrades the scene every once in a while, and there are 6 hours and 59 minutes left before the next upgrade." Han Du read it out softly, feeling that it might not take him 6 hours to complete this task.

Continued, another line of words appeared, and Han Du read it out: "In this mission, there are hidden exploration props, if you complete the task before the next upgrade, you will be rewarded with hidden props." ”

"This task requires that the workers solve the difficulties they are facing until they leave the tunnel."

Such three lines of words made Han Du understand what to do in the face of this limited scene task.

He quickened his pace and stepped into the stagnant water, and under the light of his flashlight, he soon found a worker with a hammer and rod who was constantly chiseling into the stone wall.

He looked to be in his forties, wearing a hard hat and old overalls, and the iron rod in his hand was pointed at the tip, and it was constantly hit with a hammer against the stone wall, and a small hole had been carved out of it, and it was not known what it was used for.

Han Du's bright flashlight was much brighter than the light around him, and it suddenly illuminated this person's eyes.

He immediately blocked it with his hand and shouted: "Oh, what are you doing, what are you doing, where did you come out of this comrade, it's not someone from the construction team, hurry up, hurry up!" ”

The flashlight used by Han Du was so bright, which their construction team did not have, so he immediately guessed that Han Du was a curious person to see the excitement.

"Uncle, I'll leave in a while, what are you doing here?"

Han Du leaned over and saw a small amount of blood dripping down the water, which turned out to be that he had accidentally smashed his palm with a hammer.

Han Du hurriedly touched his body, trying to find a band-aid for him, but he forgot to bring it when he went out.

"Uncle, why don't you apply medicine when your hand hurts?" Han Du looked a little unbearable, the wound on his hand was very large, and blood kept coming out.

"It's okay, it's okay, this kind of injury is often there, and now the important thing is that I have to set up electric lights here, otherwise it will be inconvenient to transport things outside, and the construction period will be delayed."

As he spoke, he continued to strike the rod with his hammer, and the sound of striking was deep and powerful.

Han Du saw that there were electric lights set up along the way, but the original location where the electric lights were erected here had cracked, and the electric lights could no longer be fixed, so he temporarily took off the electric lights and put them on the stones on the side.

The light was already weak, and it would not illuminate the surroundings if it was placed low, and now he had to dig a new hole as soon as possible to secure the light.

This is a very simple thing in modern society, but in this era of lack of everything, it is a very laborious thing.

Han Du wanted to ask him why he didn't use other electric digging tools, but thinking that it was nonsense to ask, if he had, he would definitely use it, at this moment, he suddenly screamed, and the palm of his hand holding the iron rod was accidentally hit by the iron hammer, leaving another bloody wound.

Han Du couldn't stand it anymore, so he grabbed his arm that was about to continue to hit the iron rod, and said, "Don't knock, my flashlight is for you to use, I carry a super strong battery, which can last for a week." ”

Han Du stuffed the bright flashlight to him, hoping that he would go and deal with the wound now, and when the flashlight ran out of power, the injury on his hand was estimated to be almost better.

"Give it to me? So what do you use for yourself? It's the first time I've seen this flashlight, it's really a thief, it must be very expensive, right? The kind-hearted worker uncle was very embarrassed with Han Du's strong flashlight, but he was worried that Han Du would not be useful.