The shouting failed, and soon a technical branch stepped forward, and this time it was the reconnaissance team of the 33rd detachment that stepped forward, and Qin Fei participated in it with honor.

Hula...... Team leader Liu Gang landed on the ground, and Qin Fei found that Liu Gang was driving a glider mecha, which had changed from the prototype he had designed, and the design was more perfect and had a more light feeling. Qin Fei is not surprised by these changes, it is strange if there are no changes. In fact, the country has accumulated a lot of technology, as long as a breakthrough is found, the original technology will advance by leaps and bounds in a short period of time. Of course, the overall appearance of the current mecha design still can't completely get rid of Qin Fei's original prototype.

"The kid is good, he really came, it seems to be more than enough. Before Lao Tzu became an evolutionary, he could only play online games. Liu Gang's tone was full of praise, as well as overflowing sourness.

"Qin Fei, I'm a berserker, Huang Long. Damn, I'm going to give you the name of Berserker in the future. "A humanoid mecha with a height of only 20 meters walked over, and it was Huang Long, a C-9 steel warrior in the reconnaissance team. Although Huanglong's mecha is humanoid, it looks a bit bloated, and such a mecha has a large internal space and can put a lot of energy, weapons, etc.

The surface of the mecha is camouflaged and very inconspicuous; The only thing that stood out was a 75mm caliber weapon. According to Qin Fei's understanding, this 75mm caliber weapon can not only launch a solid warhead, but also launch a small intelligent missile, or an ordinary artillery shell, and at a critical time, ultra-small nuclear bombs, dirty bombs, electromagnetic pulse bombs, etc. can also be fired. The 75mm caliber gives the shells plenty of design space and a wide variety. Oh, and there was a big-headed knife on his back, which was seven or eight meters long.

"Hi, Qin Fei, I'm Liu Xiaolong, a sniper." This Liu Xiaolong's mecha is even smaller, only fifteen or sixteen meters high, but this guy's barrel is five meters long, far more than the two meters and three meters length of ordinary barrels, and the caliber is 45mm; There is no cold weapon behind the mecha, but there are two short weapons hanging from the waist, a spike three meters long and a dagger two meters long; The length of three or two meters can only be regarded as a short weapon for a mecha.

"Alright, let's get busy. Qin Fei stomped on the ground, once every three seconds. Liu Gang said as he inserted some small instruments into the ground. To detect the underground environment, sound waves are still the best means.

Qin Fei raised his feet, what was the feeling of a mecha weighing three hundred tons stomping his feet?

With a bang, the ground was directly trampled down, and the entire sole of the mecha's feet sank into the soft ground, and the soil helplessly rolled out to protest against human violence.

"Tap, just have enough sound. But that's great! Liu Gang continued to monitor, and there were other detectors around him to investigate.

The speed of sound propagation in the earth is not fixed, because the earth is complex; But it's more than 3,000 meters per second; Sounds are emitted every three seconds (stomping) enough for surrounding sonar to detect the general situation here; Combined with some of the previous data, it is possible to determine the basic overview of this underground base, such as shape, depth, weakest point, and even according to the sound difference, etc., you can also calculate the main materials for the protection of the base, etc.

Of course, in order to accomplish such a reconnaissance, a lot of basic data and data are needed, and extremely sophisticated reconnaissance equipment is also needed, but it is obvious that the military absolutely does not lack such data, materials, and equipment.

Gradually, little by little, the information began to be refined:

First and foremost, make sure that the underground base exists, and that the whole is located at a depth of 500 meters.

The second is the scope of the base, the east-west span is 2.6 kilometers, the north-south span is 3.2 kilometers, the underground space is not not continuous, but a pit here, a hole there, the most important thing is that after exploration, it was found that the underground base is not a layer, the deepest layer even has a depth of two kilometers. Although modern technology is developed, it is really a lot of work to complete this base silently.

However, underground detection and underwater detection are completely different things, and underground detection is more difficult, and only relatively vague results can be obtained. But it was enough, and I quickly found an access to the most underground base.

For these evil scientific research organizations, it is not simply to destroy them, but also to catch the main personnel, get the main technology, and most importantly, see if you can find out the big fish and related personnel behind - the last one is the most important!

Cutting grass must be eradicated, and every evil scientific research organization is a sharp sword hanging over the head of modern civilization, which must be completely pulled out.

Soon the search for the exit of the passage in front also paid off, this passage is very small, only by car, it should be the usual material transportation channel; But apparently it's not very safe.

"Then we'll have to dig through the ground!" Wan Qingshan has made a decision, and it has been delayed for a lot of time at this time, and it can't be delayed any longer. It's not easy to dig through a 500-meter-thick ground in a short period of time, but it's easy to dig with a mech.

Qin Fei picked up a steel shovel up to 40 meters long, and a shovel went down to a depth of five meters, and it was seventy or eighty cubic meters of soil at a glance, which was much faster than the efficiency of the excavator, and it was very flexible, digging a big pit of more than ten meters in three or five strokes, cool and crooked; Qin Fei felt that the earth seemed to have turned into dough now, and he kneaded it casually.

Boredom, Qin Fei tried to calculate the energy consumption, and found that the energy consumption was much lower than that of the excavator, and the flexibility made the excavator unable to catch up; It's just that the cost of the mecha is a hard injury.

"Go on!" The detection was simply completed, and Wan Qingshan continued to supervise.

Whoosh...... Whoosh...... The mecha is definitely a good helper for doing manual work, and in a few clicks, it is 30 meters deep again, and the hole begins to shrink slightly, which is the standard excavation mode. Keep checking and don't find any problems, so keep digging. The hole grew deeper and deeper, and huge buckets passed through the mech's hands like small flower baskets. This kind of excavation consumes a lot of energy, but the speed is extremely fast, even if it encounters granite, the powerful cold weapon of the mecha can be smashed with a few clicks.

It only took two hours to dig with all his strength, and the powerful mecha dug through more than 450 meters of ground, and even the rocks underground could not stop the mecha from excavating; The surrounding walls have long been sprayed with a natural decomposable curing agent, which can intercept the surrounding groundwater for at least a month.

"The last 50 meters." Soon the last fifty meters of excavation were completed, revealing a huge, solid reinforced concrete spire. All the mechs immediately began to retreat.

"Click!" Huang Long was in position, the 75mm muzzle (muzzle) hung low, aimed at the spire, and this time without shouting at all, an armor-piercing projectile erupted.

With a boom, the debris flew and a huge hole appeared. Facing the 75mm caliber muzzle, the reinforced concrete defense was simply a small cardboard, and a hole of five or six meters in size was torn open by more than a dozen consecutive extra-large armor-piercing bullets in a few breaths.

"Release the probe." Some small probes, and even small propeller planes the size of a palm, entered the hole.

Crackling ...... sparks were heard from beneath the hole, and it looked as if the probes had voluntarily fallen into a power grid that had long been unprepared. When there is nothing in the grid, you can't see it, and if something falls in, it will trigger a release reaction.

"It's all scrapped!" Quite a few people exclaimed.

"It's a high-voltage electric field defense in an enclosed place!" Wan Qingshan was very calm, but obviously such a method could not shock Wan Qingshan.