In ancient times, Taihu Lake covered an area of more than 2,400 square kilometers and was the second largest freshwater lake in China.

After the Doomsday War, due to the change of terrain, the area of Taihu Lake has expanded a lot, according to the statistics transmitted by satellites, it has reached more than 6,452 square kilometers, and the deepest depth has reached more than 300 meters.

Yunying should go back safely, as for the completeness or incompleteness of the then let's talk about it, at least the surface is complete...

Because, not long after, a large force drove up on the lake and began a meticulous search.

But with an area of more than 6,000 square kilometers, coupled with the obstruction of those ferocious mutant beasts, such a search is just a routine matter, and Ma Ping'an is still very comfortable under the water.

At this time, Ma Ping'an was dangling at the bottom of the 6,452 square kilometers of lake, and his two small eyes were shining.

Mecha has not been around for a long time, and ordinary mecha in the water cannot exert its original power, so it is often much more dangerous to explore in such large lakes and oceans than on land.

But because of this, this kind of place has become uncultivated virgin land, although he has not been able to find any base, but Ma Ping'an is still quite fruitful.

In three days, a total of two A-level mutant beasts, nine B-class mutant beasts, and twenty-three C-class mutant beasts were discovered.

These are all recorded in the "Variation Chronicles" without any information.

If you do the math, you can get thousands of rewards for discovering new species alone.

If all this credit is put on the head of the Beast Adventure Group, it will be enough for it to move up a few levels in a row.

Ma Ping'an now knows why there are so many expeditions that go one after another when he knows that there are many dangers and tens of thousands of people die every year, and he is not tired of it.

It's so fucking good money!

Everyone in the world, the hustle and bustle is all for the benefit...

Of course, if there were no mecha as powerful as the Dragon Warrior, it would be very likely that the reward would have been lost before the reward arrived.

The only thing that doesn't feel good is... Some things don't seem very convenient ...

Stomach problems are also forgotten.

Although he didn't expect to be delayed outside for so long, he only brought a day's worth of compressed dry food and water bags when he came out, but the abundant aquatic products in Taihu Lake were enough for Ma Ping'an not to worry about hunger.

If you are lucky, you can still find a lot of delicious freshwater oysters, it is an aphrodisiac thing, just a few days ago I consumed a little yang energy, I have to make up for it!

However, the problem of excretion after eating has become a problem.

Although it is not possible to turn the entire lake over and search it carefully, it is not much of a problem to monitor the lake.

From time to time, there are patrolling aircraft passing over the water, and there may be satellites firmly monitoring overhead, Ma Ping'an does not dare to rashly surface the water to find a place to solve it.

Underwater, the cockpit cannot be opened, and small prey can be brought closer to the cockpit through a sealed conveyor channel.

But outside, even if Ma Ping'an's ass is high, it can't be aimed at that small hole.

Fortunately, after three days, it seemed that the scope of the search had been moved to other areas, and the lake gradually calmed down, and finally on a dark and windy night, the horse, who already had a balloon-like bladder, found a relatively safe place to go ashore.

It is one of nearly a thousand small islands in Taihu Lake, surrounded on all sides by sharp black reefs.

These reefs are rich in metal, and under their protection, the mechs are safe at night, even if the satellites are equipped with metal sensors.

After carefully observing the surrounding situation, the aircraft that had been shuttling over the lake for 24 hours a few days ago had disappeared, and the calm lake was extremely silent.

Occasionally, a fish would leap out of the water and make a ripple in circles, but it quickly regained its calm.

After confirming that it was safe, the mech climbed between the two reefs.

This small island is strange, not as full of life as other islands, and behind the reef is a steep mountain wall tens of meters high that surrounds the entire island.

There is no grass on the mountain wall, and it is black and oppressive, giving people the illusion that it is about to collapse.

Fortunately, there were still a few narrow flat rocks between the reef and the mountain wall, Ma Ping'an hurriedly rushed out of the mecha, went around the back of the reef, quickly pulled off his pants, and squatted down.

After the whole body was comfortable, Ma Ping'an walked towards the dragon warrior slowly, and just took two steps, he suddenly found that the reef in front of him seemed to be a little strange.

The outcropping part of the reef, which is about three meters in diameter, is about seven meters high, and although the moon is dim, you can still see a little metallic luster on the black reef, like stars in the sky in the dark night.

"Well, these stones are probably the product of the center point of the nuclear explosion..."

The instantaneous heat at the center of a nuclear explosion can dissolve metals, rocks, and dirt, and when mixed together, such stones are produced.

At the closest place to the surface of the reef, there was a little silver that was the most dazzling, Ma Ping'an squatted down again, and gently stroked it with his index finger, it was a round bulge with a cold touch, the size of a thumb, like a silver pearl, lifelike in the moonlight.

"What is this?"

Ma Ping'an became curious, and suddenly remembered the secret room mechanism in the ancient zoo, so he pressed it a few times, and twisted it to both sides, but the thing didn't move at all.

Looking at the lake, he saw that the island was surrounded by several other islands in the middle, and even if there was light in the distance, he would not be able to see it, so he stood up and got into the mecha.

The dragon warrior took a few steps forward, and when he reached the reef, he shook his right hand and slashed towards the reef with his light energy sword.

There was a crisp 'pop' sound, and a piece of the boss collapsed on the reef.

Brushing away the stone chips, Ma Ping'an was suddenly excited, there was a piece of silver metal in the reef, and the bulge in front of it was just a corner of it.

As soon as he was happy, his hand shook, and even the light energy war knife in the mecha's hand was slightly off the direction, and with a 'ding', it slashed straight on the piece of metal.

"Holy!" Ma Ping'an was suddenly startled, the energy degree of this light energy war knife was as high as two hundred and sixty energy degrees, and ordinary metals would basically end up in two if they didn't have energy protection.

When he lifted the knife, he was surprised that the piece of metal was unscathed, and there was not even a trace left on the smooth surface.

This relieved his mind, quickly chopped up, and in a few clicks, the piece of metal was dug out, and Ma Ping'an jumped out of the mecha and picked it up.

It was a piece of metal about 20 centimeters in length and width, about 5 centimeters thick, very heavy, smooth on both sides, with straight shallow lines on all sides, but there was no gap between the front and back, left and right, and it was shaken close to the ear, and it felt like it was solid.

Ma Ping'an pondered for a long time, but he didn't understand what this thing was.

Alloys are weird.

It stands to reason that which metal and which combination will produce what kind of effect is a simple and straightforward matter.

But in reality, there are hundreds of known metals out there, and the simplest pairing is astronomical.

Not to mention the synthesis of multiple metals, each of which has to determine a certain proportion, the possibilities are almost infinite.

So every alloy, theoretically speaking, is found by luck, and it cannot be imitated without samples and detailed data.

The piece of metal at hand can't even be cut by a light energy war knife, the hardness can be imagined, and it can remain intact in a nuclear explosion, and the melting point must be super high, it must be a special alloy.

Take it back and let the two analyze the ingredients, it should be able to synthesize it by itself, and then it will be plated on the mecha, maybe it can raise the defense of the mecha by a notch, it's a treasure.

Ma Ping'an smiled and took it back into the driver's cabin.

Speaking of which, the pre-apocalyptic mecha design is really quite humane, the dragon warrior's cockpit is very spacious, the powerful internal sound, the 360-degree ring-shaped virtual screen...

Not to mention the entertainment facilities, there is even a small Xiaoice box and several storage boxes on both sides.

Many of the mutant beasts that the Alliance has placed bounties on are huge, and it is unlikely that they can carry their entire corpses to receive their rewards.

Therefore, the alliance has set up some special parts as the basis for hunting mutant beasts according to the different parts of each mutant beast, as long as you take these parts, you can be regarded as completing the bounty.

For example, the crystal nucleus of the Flying Flame Beast, the short whiskers of the Ice Squid, etc., are now filled with such loot in the refrigerator and storage box.

Ma Ping'an searched for a long time, and he didn't know where to put this metal block, the refrigerator and storage box must not be stuffed, and it would affect the operation when it was thrown in the cab, and it was really a headache.

Turning over, I suddenly saw a square lid on the hatch, opened it, and suddenly felt happy in my heart, there was a small depression in this cover, boxy, and the size was about the same, so I hurriedly stuffed the metal block into it.

After a plug, I was taken aback, the depression was extremely suitable for the metal block, and even the vertical shallow lines on both sides were completely suitable...

It felt as if it was specially designed to hold this metal block.

"Damn, it can't be such a coincidence, pick up a part of a dragon warrior..."Ma Ping'an scratched his head and closed the lid.

As soon as the lid was closed, suddenly the virtual screen in front of him flickered, and then a circular shield mark appeared in the middle of the screen, and a flying dragon with teeth and claws was drawn in the center of the shield, and a row of words appeared below 'Huaxia Nandu Military Region'.

With the appearance of the mark, a female voice sounded in the mecha: "The authentication system is activated, the unit to which the mecha belongs: Huaxia Demon Capital Garrison Area Equipment Research Institute, mecha number SHV-001, authority A-S level, can you pass, do you want to open the base passage?" ”

"Why isn't it the old man's crow voice?"

Ma Ping'an was stunned and looked at the changes in front of him, and subconsciously replied: "Open the passage!" ”