When the three-dimensional structure diagram was placed in front of Lu Jian, Commander Lu was so surprised that his two eyes almost turned into cross-eyed.

Judging from the picture, the most conspicuous thing in the bone mound is the huge cavity with a diameter of hundreds of kilometers in the center, and the criss-crossing large and small passages start from the central cavity and gradually extend to the surrounding area, all the way to the surface of the bone mound.

Figuratively speaking, the bone mound is a hollowed-out asteroid, like an oversized ant's nest.

This was the first time that humans had obtained data on the internal structure of the bone mound, and the excited Lu Jian almost fainted from joy.

According to the data of the bone mound structure, the headquarters tailored a new combat plan with the fastest speed, and the task finally fell to Bi Qun.

After receiving the order, Bi Qun immediately assembled a large group of commandos to drive four landing craft to the surface of the bone mound.

Three landing craft are enough to transport a large group of commandos, and the fourth landing craft is actually a drill craft that specializes in making holes.

The outer skeleton man who was completely enclosed inside the bone mound did not know what was going on on the surface of the bone mound, and Bi Qun parked the four landing craft at the predetermined location, erected the laser rock drill at the tail of the drilling boat, and adjusted the drilling angle by himself - the coordinates and angles in the plan must be strictly followed, so as to ensure that a certain passage deep underground will not be cut off during the process of caving and drilling, and the outer skeleton will be hidden.

Press the start button of the laser rock drill, the blunt rock drill drill immediately appears a crossed conical laser beam, the crystallized ground is quickly radicalized by the high-energy laser, a large hole with a diameter of more than twice the drill bit, the intensified high-temperature steam continues to rush up from the hole, flying to a height of nearly 100 kilometers before slowly drifting, some of which are directly condensed on the drill boat, adding a thick shell to the drill boat.

Theoretically, a laser rock drill can drill through 200 kilometers of formation per hour, but this thing is definitely a big-bellied electric tiger, even if 80% of the space on the drill boat is power storage equipment, it can only support an hour of continuous drilling.

Coupled with the time to clean the hull and return to the battleship to recharge, it took Bi Qun a whole day to drill through the formation of nearly 800 kilometers, and the bottom of the cave was only a dozen centimeters of rock left from the hollow in the center of the bone mound.

When everything was ready, Bi Qun instructed the soldiers to set up a hanger more than one person high at the entrance of the cave, and then carefully hung the ten super nuclear bombs that had just been transported from the battleship on the shelves, not forgetting to hang a huge stone at the bottom of the nuclear bomb.

"Withdraw!" As soon as Bi Qun gave the order, the four landing craft quickly flew away from the bone mound, and after Bi Qun returned to the battleship, the Yellow River immediately accelerated away.

It didn't take long for the timing device on the shelf to unlock, and ten nuclear bombs and stones fell at the same time. After falling in a straight line for nearly 800 kilometers, the stone first smashed through the compartment that was only a dozen centimeters thick, and ten nuclear bombs followed closely and fell into the core of the bone mound.

Before the outer skeleton people inside the core could understand what was happening, the timers of the ten super nuclear bombs were reset to zero at the same time, and in an instant, the core of the bone mound turned into a scorching furnace, and the flames swept through the bone mound along the passages that extended in all directions, sweeping everything away from it......

If ten super nuclear bombs explode on the surface of the bone mound, at most ten large craters and a few vitrified surfaces will be blown up, but they will explode deep into the bone mound, and the closed bone mound will seal all the explosion energy inside, like an iron shell full of high explosives.

The tragic bone mound once again confirmed the immutable truth that the fortress is easiest to break from the inside, the huge bone mound is like an oversized firework, suddenly bursting from the inside, directly exploding into more than a dozen large fragments that are torn apart, and a large number of countless fragments are scattered in all directions, and when the flames of the explosion disappear, only a piece of broken wreckage remains in the place where the bone mound was originally parked.

Lu Jian, who witnessed all this, finally breathed a sigh of relief: "Supply ship, replenish ammunition and supplies for the Yellow River; Bi Qun, you take the Yellow River to clean up the battlefield, and you must annihilate all enemy troops and cut down the grass and roots; The rest of the ships, come back with me, and go back to meet the bone mound three. "I don't believe I can't clean up these shitty bony mongrels." ”

Xu Dong raised his eyebrows, and deliberately said in a relaxed tone: "Commander, that, dogs are actually quite good, let's not insult them, okay?" ”

"Get out of the way." Lu Jian scolded with a smile and made a false kick, "Notify the Yangtze River again, keep in touch with the base at any time, confirm the location of the No. 3 bone mound, and don't accidentally bump into the hands of the outer bone man." ”

The Yangtze River was seriously short of ammunition, and with only defensive microwave cannons and main guns, it was difficult to say whether the large force that ran into the outer skeleton could escape. However, the possibility of the Great Wall escaping from the ascension with the optical stealth system is very high.

If it is a battle in a frontal battle, there is nothing to say, but if it is due to human negligence that causes his own battleship to encounter enemy forces, he cannot shirk the responsibility of the commander.

"Don't worry, Commander, with such a large galaxy, the chance of colliding with the Outer Bone Man is smaller than letting the asteroid smash to death, so there must be no problem." Xu Dong said optimistically.

"I hope so." Lu Jian took a deep breath, "The target is to advance to the base, return!" ”

"Faster-than-light engine ready, three-minute countdown ......"

Seeing the main force disappear in the colorful shimmer, Bi Qun sighed faintly, this has exploded into more than a dozen pieces, which outer bone man can survive such a violent explosion? What a grudge!

On March 31, 2205, the main force of the expeditionary force conquered the black bone mound of the wolf colony, and on the same day, the main force of the fleet returned at full speed.

Half a month later, the Yangtze River.

"Base base, I'm the Yangtze River, please answer when you hear it, please answer when you hear it......" Fu Hongye called for more than an hour with a dry mouth, but he couldn't hear the playback, he poured two large mouthfuls of cold boiled water, and said dejectedly, "Captain, there has been no response for so long, is the resonance communication instrument over there at the base broken?" ”

Ever since the communication device of the Great Wall of Zhilu Road was damaged, Fu Hongye has always thought that this new communication device is not up to par, and he always feels that the communication devices on other ships will follow in the footsteps of the Great Wall sooner or later.

Ye Fei, who was sitting in the command chair, had a sad face: "I was fine yesterday, how can I say that it is bad?" Tell me what this is called, we'll be there in two days, no problem sooner or later, but this time the chain will be ......"

Fu Hongye licked his lips: "I'll try again." ”

"Forget it." Ye Fei scratched his scalp, "It's the same if you try again, let's try to contact the headquarters and ask them if they know about the situation of the Dao base." ”

Fu Hongye nodded: "It's okay." Headquarters headquarters, Yangtze River call, please answer when you hear it. ”

"Yangtze River, I'm the headquarters, please speak."