Yu Ming led Liu Hui's boat to the place where the iron chain was buried, and several people slowly put the underwater robot into the water, the process should have been completed by the crane arm, but there was no such equipment on this ship, so it had to be completed manually by a few people, through the camera and fiber optic cable on the robot, the underwater situation was transmitted back to the laptop carried by Liu Hui, and the underwater situation was clearly displayed on the screen.

Liu Hui said with a smile: "Today's underwater situation is good, and the visibility is very high." After speaking, he manipulated the robot arm, aiming at the junction between the iron drill and the stone wall, and then, a light blue arc of light was released from the robot arm, and the iron drill was cut off in an instant, and Yu Ming was dumbfounded. Liu Hui explained: "This is the latest underwater cutting technology, the robotic arm shoots high-temperature and high-speed plasma gas to cut off the iron drill. ”

Yu Ming finally said the question in his heart: "Why do you want you to use these high-tech equipment to cut the iron cable, can't you just blow up the iron cable with explosives?" Liu Hui said: "We will not only be able to cut them off, but also weld them back again, and the captain intends to use this passage to block the escape of the Russian troops from the three surnamed cities from the water." ”

Only then did Yu Ming understand that Liu Hui and the others remotely controlled the robot to cut off all the iron cables, and then received the iron cables into the boat. There was no obstacle, the fleet went all the way east along the Songhua River, and there were still some Russian troops stationed in several small towns in the middle, but none of them formed a decent resistance, and soon, the new 1st Division and 1st Brigade came to the city of the third surname.

For the Russian troops in the city, they felt that Lin Yuan's troops were coming a little quickly, and they didn't seem to be fully prepared, especially the commander of the Second Army in the city, Sulonev.

Grodeko's order transferred the two brigades in the city, and all that was left was a brigade of the Second Army and the remnants of the First Army, less than 5,000 people, if it weren't for Alekov's persuasion, Sulonev would have reported that he would have abandoned the city and retreated backwards, and Rahsusu was still too small to seem to be enough to stop Lin Yuan's army, so it was safer to withdraw all the way to Khabarovsk.

Alekov analyzed: "Lin Yuan's troops outside the city of the third surname are only 6,000, as long as our reinforcements arrive, they can counterattack in one fell swoop!" There is an "unspoken rule" in the Russian army, that is, not to attack if you do not gather twice the enemy's strength, so the two decided to gather the forces in their hands, defend the city of the three surnames, and report to Grogerko and ask for reinforcements!

Although the defenders in the city are insufficient, the city has always been an important town of the Qing court, and the city walls are made of large stones on the nearby Guowei Mountain, and the cannonballs cannot be broken, so it is still very difficult to conquer it.

In Lin Yuan's telescope, the city walls of the three surnamed cities were very clear, and the patrols on them were loaded with guns, "ten minutes", Lin Yuan said in his heart, the time interval between the two patrols passing through the same place was ten minutes, which meant that his own people had no way to plant explosives close to the city wall.

Lin Yuan mobilized the 1st Brigade and the 2nd Brigade of the New 1st Division, with a number of more than 6,000 people, which formed a certain strength advantage over the Russian army in the city, but the city wall was so strong that if you wanted to knock it down, it would be not enough to say anything! What's even more difficult is that Khabarovsk has already sent reinforcements to the city of the three surnames! The two brigades that had been transferred to Qiqihar by Grogerko were also rushing back, and if they could not quickly capture the city of Sansurname, their troops would be surrounded and annihilated under the city of Sansurname.

Lin Yuan was clueless for a while, and he didn't seem to know how to fight this battle, and suddenly, a sentence popped into his mind, "Don't care about the gains and losses of one city and one place, you must destroy the opponent's vitality!" ”

Lin Yuan suddenly realized and thought, "That's right! Why do you have to fight the city of three surnames? Knock out their reinforcements, and they will collapse without a fight! ”

Lin Yuan immediately called Liu Hui and Yu Ming to the conference room, and Lin Yuan asked Liu Hui: "Didn't I ask you to install the iron cable in the river behind the city of the third surname?" Do you have it installed? ”

Liu Hui shook his head and said, "According to our plan, we will install it this afternoon." Lin Yuan said: "There is no need to install it, the plan is canceled." Several people were stunned.

Lin Yuan unfolded a map and said: "You see, this is the city of three surnames, the Songhua River begins to flow between the two mountains from here, the north bank of the river is the Qinghei Mountain, which is part of the Xiaoxing'an Mountains, and the south bank of the river is Shuangyashan, which is part of the Changbai Mountains, and the Siberian Third Army in Khabarovsk wants to support the three surname cities, and the most convenient route is to take the Songhua River, the flow speed of this section of the river is not fast, which is very suitable for the steam troop carriers of the Russian army!" The Third Army, stationed in Khabarovsk, has already sent a brigade of more than 5,000 men to reinforce the city of San. ”

Liu Hui asked, "What do you mean: we use iron cables to stop this part of the reinforcements?" ”

Lin Yuan said: "To be exact, they were sealed on a section of the river with iron cables, and then, our people attacked them on the shore!" ”

Liu Hui said: "Seal them on the river? Then we can only lay a chain in front of us, and then cross the Russian fleet, and lay another chain behind them, so that we will definitely meet the Russian fleet and not be discovered by the Russians? ”

Lin Yuan said: "You lay iron cables twenty-five kilometers away from the three surname cities, and then go down the river to ten kilometers downstream, where the Songhua River divides into a large pool, and that pool has no name, you hide in that pool, in order to support the three surname cities as soon as possible, the Russians will definitely not go inside to check, even if you go in, the area inside is very large, they will not be able to find you, and as soon as the Russian fleet leaves, I will send you a signal, and you can come out to lay iron cables." ”

Liu Hui said: "I understand, then I'll prepare." ”

Lin Yuan nodded, and Lin Yuan asked Yu Ming, "How many people do you need for this ambush?" ”

Yu Ming didn't answer directly, but asked: "I need to know the topography of the river channel, if the river is not more than three meters higher than the river, as soon as we shoot, the Russian boats will dock, and then they will come ashore to counterattack us." ”

Lin Yuan replied: "The ambush site I chose, on both sides of the dam built by the Qing court, now the Songhua River is not large, the water surface is three meters from the top of the dam, and the Russian army cannot come up." ”

Yu Ming thought for a while and said, "It's enough for me to bring five hundred people, but I want to bring more artillery." ”

Lin Yuan said: "When we were fighting the Russians, we captured forty 75mm guns, you can bring them all. Yu Ming quickly set off with people, they rode fast horses, rushed to the ambush site, at this time Liu Hui, is operating the underwater robot on the river to lay iron cables, there are many task modules of the underwater robot, it can not only complete the cutting task, but also complete the welding task.

Liu Hui commanded the remote control robot to insert the iron drill into the crack of the stone, and then welded the iron drill firmly, in order to deal with it before the Russian reinforcements arrived, they all moved quickly.

Then Liu Hui took people to hide in the place designated by Lin Yuan, and soon, twenty Russian troop carriers, escorted by two gunboats, sailed into the ambush site.

Lin Yuan received the notice, and immediately ordered Liu Hui's boat to sail out of the pool, and laid an iron cable behind the Russians according to the plan, which is equivalent to putting the Russians in a cage, which is equivalent to an ambush on the Ming side!