When Liu Ru was resentful and secretly blamed Dong Ku, Dong Ku was already in the filthy sewer.

After sealing the exit of the newly dug shaft, Dong Ku led the team to measure it, and rushed all the way to the designated place that was only more than 400 meters away.

After measuring back and forth several times, Dong Ku finally stopped by a stone wall.

"That's it, start digging!"

The members of the Flying Tigers have already learned that their mission is to rob the bank and recover the proceeds of the Japanese army's autumn sweep. Although I don't know how to grab it, I'm very excited.

The position was determined, and the yak took the crowbar, and in three strokes and two clicks, he detained a piece of the stone brick that had been blistered and was not very strong, and then the stone bricks were pulled off one by one.

The team members all had a miner's lamp above their heads, making the dark sewers clear. Everyone quickly waved the sapper shovels to dig down the soil behind the stone bricks, transported it to the bottom ditch next to it, and splashed it in the water.

The mud quickly disappeared as the water washed away, so that the baskets of dirt did not gather into piles.

The team members were covered in sweat, took off their cotton clothes, and fought shirtless, letting the hole slowly sink inward, and soon, the head of the head disappeared into the hole.

One by one, the team members relay the baskets of dirt and carry the soil out of the tunnel.

Half an hour later, Dong Ku took over the carp and waved the sapper shovel to act as the main force in front, while the carp withdrew from the pit and came outside, breathing in the fresh air.

There is little sand and gravel in the land in the northeast, and the height of Dongku's excavation is still the loess layer, so naturally there is no sand and gravel. This made the tunnelling very fast, and in just two hours, the tunnel was excavated by more than 10 meters. As the tunnel lengthened, the oxygen in the sewer, which was already thin air, was not enough to supply the two dozen people in the tunnel to breathe, and the speed of excavation immediately slowed down.

Dong Ku handed over the sapper shovel to the pig, he went out of the tunnel, and after the ventilation pumping pipe was lowered into the tunnel, the two team members who stayed behind outside began to pedal and drove a human blower to send air into the tunnel, so that the tunnel that had begun to suffocate was cleared, and the speed of excavation increased again.

After fighting for more than five hours, the tunnel extended more than 30 meters, but there was still no shadow of the cement wall.

"Could it be that the excavation is going in the wrong direction?"

Dong Ku's heart began to be at a loss. Although the measurement was very detailed, after the ground was measured, and the sewer was carefully measured several times, the original estimate of the distance was only about 30 meters, but now it is almost the same, and it is said that you should be able to see the cement wall.

Although there were some suspicions, after all, when entering the bank vault, he only estimated the approximate boundary of the two-story vault by feeling, and it should be normal for the error of a few meters, so Dong Ku did not order to stop and continued to excavate.

Sure enough, after six meters of excavation, the backfilled rough stone appeared.

Seeing Mao Shi appear, Dong Ku was overjoyed and arrived at the place.

At this point, they can't do without the top as they used to. However, the items were ready, and the planks and stakes were placed in the enlarged hole, supporting the excavated rubble backfill.

An hour later, the rubble in front of me was piled up all at once, and the smooth, formwork traces of the concrete wall were exposed.

"Yay!"

Dong Ku excitedly clenched his fists and made a successful gesture, and then ordered in a low voice: "Leave five people to transport the rough stones away, support the tunnel, and then evacuate." With that, he turned around and walked out of the tunnel.

Yakzi and the others quickly cleaned up the rubble, and when Dong Ku left the tunnel, it had been cleaned up, and was doing the most difficult work to support the top.

Dong Ku ordered the two blower-kickers to stop, and after separating the guards, he left the sewer and returned to the house.

At this time, it was already afternoon, and it was approaching dark. Huzi and Zhao Liqiang, dressed as Japanese, were driving the trucks into the yard one by one.

Dong Ku briefly inquired about the situation, and then entered the house to eat and recover his strength.

In a moment, the team members also left the sewer one by one, in addition to the two people on duty in the sewer, there was also a person at the entrance of the firewood room listening to the movement below, once the situation was not right, they would quickly evacuate.

It was getting dark, and Dong Ku and the others were almost resting, and in the night, they sent the cylinders and the necessary items into the sewers.

At the same time, only more than 30 kilometers away from Harbin, a convoy was parked on the road, and figures armed with shell guns were vigilantly staring at the surrounding woods. The lid of the car at the beginning was lifted, and the two people were busy repairing the car with flashlights.

Entering the tunnel, Dong Ku left only three people, and the others were waiting outside the cave, and two pipes led down the tunnel to the exposed two-meter-high cement wall.

Yakzi and Liu Hai watched Dong Ku busy, and they didn't know what method Dong Ku would use to break open this cement wall.

"Put on a respirator."

After Dong Ku got all the valves in place, he tried them, and whispered an order as he picked up the underwater breathing apparatus made by the scientists there on Crescent Island and put it on his head.

The three of them were wearing cotton jackets, and they were already sweating profusely at this time, and after hearing the order, they quickly put on their breathing apparatus and stood there, waiting for Dong Ku's order.

Dong Ku took out a lighter and lit a spray gun mixed with gas and oxygen, and the flame more than a meter long illuminated the tunnel.

He held a spray gun and began to cauterize the concrete wall, oblivious to the rising temperature. Ten minutes later, in a hot sweat, he reached out to test the temperature of the wall, then turned off the spray gun, took another trumpet-shaped spray gun handed by the bar, and signaled that the bangs could unscrew the valve.

Burst!

A cloud of white mist erupted from the horn and landed on the concrete wall with a soft sound. With the appearance of the white mist, the tunnel instantly cooled down, and in just a few seconds, the heat was gone.

The white mist fell, followed by a slight snapping sound, and the frost on the cement wall melted, revealing fine cracks.

Dong Ku raised his hand, bangs closed the valve, and the white mist disappeared.

Handing the horn spray gun to the gun, Dong Ku stayed for a few minutes, and after the gas blown in by the blower replaced the fluctuating nitrogen, he lit the gun again, cauterizing the area that had been sprayed by the liquid nitrogen.

After the liquid nitrogen is sprayed again, the cement wall has become powdery, and with a light pick of your hand, you can grab the next handful of crushed cement blocks.

The cold and hot expansion has made the cement wall lose its original role and turn into powder, and in a few minutes, a pit more than one person high and more than ten centimeters deep appeared on the cement wall.

As time passed, the holes in the concrete walls got deeper and deeper, and the tunneling speed became faster and faster. After all, the temperature enters the inside and no longer collapses, and is all absorbed by the cement wall. If it weren't for the squirt being tied to a wooden pole and sticking in, the pit would definitely be able to roast Dong Ku and them.

After Dong Ku cut a layer of steel mesh with the replaced cutting gun, he did not rest and continued to repeat the excavation action.

Looking at the two-meter-thick steel mesh with ten consecutive front and back connections, Dong Ku couldn't help but admire France. With such a concrete structure, even if it is a bomb, it is not easy to enter. After all, this thumb-thick steel mesh is not easy to blow up. Besides, after there was movement, the machine guns were already waiting in the vault, and it was the turn of the blasters to grab it?

At this time, in the courtyard of the house three or four hundred meters away from the Taizheng Bank at night, Huzi was lying on the roof, staring closely at the Taizheng Bank, doing the work of warning at any time.

Suddenly, his eyes froze, and he reached out and grabbed the rope next to him, staring at the door of the bank without blinking.

I saw that under the illumination of the headlights, more than a dozen trucks drove in front of the bank, and a group of Japanese soldiers also rushed out of the bank, standing on both sides of the bank door with guns. Then, the stopped trucks jumped out of the Japanese troops, and under the watchful eye of armored vehicles, quickly blocked the streets around the bank.

After seeing the situation at the door of the bank, Huzi pulled the rope twice.

When! When!

Two crisp bells rang in the sewer, and the team members guarding the sewer shaft quickly lit up their flashlights when they heard the bells, and rushed to Dong Ku and them three or four hundred meters away.

Dong Ku and Yakzi, as well as another team member, squatted down quietly after receiving the warning from Liu Hai, and in the light of the miner's lamp, they pricked up their ears and listened carefully to the movement in the pit of the cement wall.

At the door of the bank, the two Japanese soldiers walked towards the bank carrying the suitcase. Huzi propped up the binoculars and watched carefully, and his hand let go of the rope. The Japanese soldiers were apparently carrying things into the bank, not discovering the Dong Treasury that was digging a hole.

In the tunnel, Dong Ku and they couldn't hear any movement, but Zhilu Dao must have made some moves on the bank, but they didn't find them, if there were Japanese troops rushing into the bank and blocking the bank, the warning prompt would be five times.

In the silence of waiting, time passed slowly. Half an hour later, the bell rang for the tiger.

At the moment when Huzi came with the news, the armored vehicles and trucks in front of the bank were leaving, and the Japanese troops outside the gate also closed and entered the bank.

After Dong Ku received the news that he could continue, he looked at the table below, and saw that it was only past nine o'clock, and he did not delay anything, so he lit the spray gun and continued to burn the pothole.

An hour later, when Dong Ku was cleaning the crushed concrete, he picked his hand, and a nail-eye-like hole appeared in the light of the miner's lamp.

Thoroughly!

Dong Ku was overjoyed, and then motioned for a few people to pause, he slowly used his hands to pick the position bigger, and with the influx of air, the light inside penetrated into the tunnel.

Dong Ku listened attentively and confirmed that there was no one inside, so he approached the hole to observe. Through the light, Dong Ku learned that their location happened to be in a small enclosed room, and the light shone in through the fence in front of the room.

When he saw that there were stacks of boxes in the room, Dong Ku carefully expanded the hole and slowly handed the powdered cement block to the yak behind him.

Bangs quickly left his place at this point, telling the team members waiting in the sewers to get ready to enter.

The team members were anxious to learn that they were about to enter, and they all cheered in their hearts, and quickly transported the empty liquid nitrogen cylinders, as well as those ventilation pipes, helium oxygen cylinders and other items out of the tunnel, sent them back to the shaft, hung the gas pipe and oxygen pipe on the cave wall, and hung the miner's lamp not far away......

PS: Bow and thank Brother Cha Liang for the reward, thank you, thank you!