Handing over control of the dungeon not only did not make Ye Han feel lost, but he was greatly relieved.

To tell the truth, he is really not suitable for this kind of work, thousands of people have to eat, drink and Lazar, just thinking about it, he feels that his head is as big as a fight.

After the settlement was completed, Ye Han was freed from complicated affairs and devoted himself to dealing with military issues and concentrating on dealing with the giant insects in the city.

The Marines' extermination efforts were successful, but it didn't take long for the swarm to recover, and it was clear that another bug had broken into the tunnel.

This is going to be troublesome, if it is just to eliminate more insects, then Ye Han can not care about it, he only needs to send troops to clean it up day after day, and he can continue to eliminate the giant insects.

But the task given to him above is to destroy the swarm that invaded the dungeon, not to consume the strength of the swarm here.

In this case, as long as the passage on the parapet wall remains, it will always be a beautiful thing to destroy the swarm.

In order to end this annoying battle as soon as possible, Ye Han gathered Xiao Yuan and the others for a meeting.

At the meeting, Ye Han sent a floor plan to others: "This is the north third area of the dungeon, which is the area where the insect swarm dug through the parapet wall, what we have to do is to find a way to plug this hole in the wall of the north third district!" ”

The floor plan of West June Fourth is full of large and small irregular polygons, each polygon is a residential area of the dungeon, and each area is full of squares representing buildings, as well as colored lines representing passages.

Among them, the core area is the largest, and the other districts are large and small, the big ones can live thousands of people, and the small ones can live hundreds of people.

The North 3rd District is a medium-sized residential area, with more than 700 residents as marked on the map.

"Captain, do you have a plan?" Xiao Yuan asked.

"If we do, we won't be looking for you." Ye Han said.

Ouyang Ping said: "It's not difficult to blow up the passage, but the blown up passage can't stop the insect swarm at all, and it will be dug up in a few days at most, and you must find another way to repair the parapet!" ”

"That's not a problem." Ye Han said, "The dungeon has a lot of building materials in stock, and you can also ask for support from above, but now the question is how to blow up this passage!" ”

Xiao Yuan said: "That place is full of insects, we have too few people, it is best to find the exit of the passage, it is more convenient to blow it up from the outside." ”

"It's hard." Ye Han said, "The Ningwuguan has not moved, and it has not been found to be abnormal for several days. ”

Luo Qi said: "The insects must have come from underground, and the exit outside may be hundreds of kilometers away, starting from the outside...... Not so easy. ”

"So you can only find a way from the inside?" Ouyang Ping scratched his scalp vigorously, "We are separated from the North Third District by several districts, and each district has a large group of insects, and it will definitely not work to attack it, unless we beat them one by one......"

"Stop making a fuss." Xiao Yuan said, "Let's just these few people, there are so many bugs over there, and there is that passage behind us, how many kills will be made up, when will we be able to fight them?" ”

Luo Qi said hesitantly: "Or, blow up all the passages?" ”

Xiao Yuan spread his hands: "How can we get over if we blow it up?" ”

Ouyang Ping thought for a while and said, "Why don't you ask the core area?" They might have a way. ”

Ye Han felt that it made sense, and immediately contacted the core area and spoke directly to Director Qu, who had just arrived for a few days, and a few minutes later, Ye Han got another floor plan and shared it with others.

This floor plan is smaller than the previous one, and it still shows a dozen different districts, large and small, but each of them has been much smaller in size, and some thin red lines start from the core area and string all the residential areas together.

Xiao Yuan asked in surprise: "What is this?" ”

Ye Han couldn't hide the excitement on his face: "This is a secret door left during construction!" ”

"Huh?" Luo Qi couldn't believe his ears, "There is still a secret door in the dungeon?" ”

Ye Han said with a smile: "This is the maintenance passage map of the dungeon, these passages are as secret as sewers, connecting the core area and all the residential areas!" ”

Several people looked at each other, a little incredulous.

Xiao Yuan said: "Captain, this is too unfortunate, right?" ”

Ye Han said: "I also think it's too coincidental, but Director Qu doesn't need to fool us, right?" ”

"That's right...... What is the length and width of these passages? Can you fit our armor? ”

"Seventy centimeters wide and two meters high, it's no problem to put on armor." Ye Han said, "But Director Qu also said that there are still a lot of pipelines in the passage, and it is impossible to conclude whether the armor can enter or not...... In this way, Xiao Yuan, you immediately arrange for two people to go over and have a look! ”

"Good!" Xiao Yuan agreed.

Ye Han said again: "Assuming that the passage can be passed, then our plan will be easy to do, my idea is to attack the east and the west, first create a little movement near the North Third District, put on the illusion of attacking with all their might, mobilize the insect swarm to move to several nearby districts, take advantage of the emptiness of the troops in the North Third District, and infiltrate the North Third District by Ouyang Ping's group, and place explosives to blow up the passage, what do you think?" ”

Ouyang Ping said: "It's no problem to sneak into the North Third District, but once we and the insect ** fire, the transferred insects will definitely come back to help, and then there will be no way to put explosives, so I think that the passage leading to the North Third District must be blown up together, the North Third District must be isolated, and the insect swarm can be completely divided to succeed." ”

"Yes!" Ye Han nodded, "But how can you pack the explosives in advance and not let the insects find out?" ”

"Drones?" Luo Qi said three words.

Xiao Yuan's eyes lit up: "Just use drones to get the passage in the third district of the north!" ”

"You can try!" Ye Han agreed, "Ouyang, arrange it immediately!" ”

"Good!" Ouyang Ping gave a few orders on the radio, and several fighters who were good at explosives immediately tied explosives to the mechanical spider and carefully manipulated the drone to infiltrate the occupied area.

These days, the Marines took the initiative to attack, and the two sides waged a desperate struggle in various occupied areas, and the walls of each residential area were either penetrated by digging insects or exploded by explosives, and large-scale collapses can be seen everywhere, and many places have even completely turned into ruins.

Even the main passages of the various residential sections were destroyed in several places by the fighting between the two sides.

Therefore, the spider does not need to walk along the passage at all, as long as it enters the occupied area, it can look around for cover, and finally slowly approach the target.

If it weren't for that, Ye Han wouldn't have agreed to this plan.

At first, everything went well, and the mechanical spiders kept moving between the rubble, but there were so many bugs in the fallen area that they were spotted by jumping insects around before they could get there.