The first thing Lin Yu did after getting up was to observe whether there were any changes in plant and insect specimens.

"Well, except for the normal dryness and loss of water, the five groups of plant specimens are normal."

"The five groups of insect specimens and animal specimens are currently doing well and there are no deaths."

After some testing, Lin Yu confirmed that the specimens that shuttled through the light film were not damaged, which proves that insects and plants are not hindered.

For the sake of prudence, Lin Yu still puts the measurement of air in the first place.

Pick up the air detector borrowed next to it, this thing is not expensive, it is available on Taobao, and it sells for one or two hundred yuan, but it is not necessarily standard, Lin Yu is in the laboratory, and he borrowed it from his colleagues.

The power is activated, and the suction pump begins to operate slowly, sucking in a small amount of air from the surrounding area and testing it.

This air detection instrument can detect more than a dozen toxic organic compounds such as NETO2, and as long as the air contains toxic components, it can give an alarm.

"Well, carbon monoxide is a bit of a standard......

Except for the carbon monoxide that is slightly marked, the air composition here is not that abnormal.

I picked it up casually, and borrowed a radiation detector next to it.

"Radiation dose...... Hey, something is wrong......"

The electromagnetic wave radiation on the side of the bronze door is very normal, but when I came here, the radiation detector was activated again, and it suddenly appeared that the radiation dose in this tunnel cavern actually reached 60 microsieverts/hour!

This number is equivalent to a person receiving 1 X-ray in an hour and a half!

Ordinary people take a 1o hour plane, but only receive 3o microsieverts of radiation, workers working in nuclear power plants, the highest radiation in a year is only 5oooo microsieverts, the average is less than 6 microsieverts an hour.

In other words, one day in this tunnel is equivalent to 10 days of work at a nuclear power plant, which is definitely an abnormal number.

"How can there be so much ionizing radiation here?"

Lin Yu frowned: "It won't be the site of the nuclear power plant leak, right?" Lin Yu thought about it again, this thing should belong to the magic side, and there was something wrong with building a nuclear power plant on the magic side.

"Nor will it! It can't be that there are high-radiation minerals around! ”

Are there anything associated with gold that carries a lot of radiation?

The radiation is only a little excessive, the harm is not so great, you can explore it a little, the time is not too long, and when you come back, take a little medicine to reduce radiation.

It shouldn't be too much of a problem.

Not far from the door was a small pile of scattered gold ore.

He stepped forward and picked up a piece of quartz, which was inlaid with several clumps of golden particles.

The content seems to be high!

Lin Yu picked up another piece and smashed the stones by hitting each other, and the broken ore did not contain other metal associated ores.

You must know that gold is a very peculiar thing, and most of the gold has a corresponding associated mineral.

On the Earth, the core is 2.6×10-6, the mantle is 0.005×10-6, and the crust is 0.004×10-6. The abundance of gold in the earth's crust is only 1/10 million of iron and 1/21 of silver. More than 99% of the Earth's gold goes to the Earth's core.

Want a lot of gold, there is! All of the purity that enters the core of the earth is still high.

Beyond the core, hehe!

Taking China as an example, there are many types of gold deposits in China, and the geological conditions of metallogenic are different, mainly produced in the fracture zone alteration rock type, quartz vein type and volcanic-subvolcanic hydrothermal type, which account for about 94% of the total gold reserves.

Their gold content is not high, and Jia is mixed with a large number of impurities, and each ton of ore can be refined 2 to 3 grams, which is already good, and more than 5 grams can be called a rich ore.

Gold ore with a high content of this impurity-free mine only needs to be crushed and screened, and the gold can be easily extracted by hand.

Find a good one, take it out and say that it is a dog's head gold, and some people believe it!

The pile of ore in front of me, slightly refined, although the purity is not so high, but the weight is definitely more than 100 grams.

Dozens of catties of gold ore can refine more than 100 grams of gold, and theoretically this kind of ore will not exist in the real world.

But what other theories are there here?

That's fine, at least it's convenient, the process of Lin Yu's refining.

Besides, this is a half-plane, which may contain some peculiarities in itself.

Tidy up this pile of gold ore first, put it aside, and Lin Yu continued to explore.

"Pop ......"

Step on the gravel and make a creepy echo in the secluded tunnel.

Hold the revolver Lin Yu under the illumination of the searchlight, and explore step by step.

This tunnel winds and turns, walking more than ten meters is a curve, although the lumen of the searchlight is high, the illumination distance is very long, but it can only be blocked by the stone wall every time. I can't see the situation clearly.

"127 m ......"

Lin Yu kept an eye on the changes in the radiation value, and after passing through the 127-meter tunnel, the radiation dose per hour changed linearly - not down, but straight up!

From the initial 60 microsieverts per hour detected near the light film, to the 73 microsieverts at the moment, the radiation dose is increasing.

Fortunately, this radiation dose is still within the acceptable range of Lin Yu, and it has not flinched. Instead, keep exploring.

"Hey, this is ......"

Lin Yu's face changed slightly, his footsteps stopped, and he stopped moving forward.

Three or four meters in front of him, there were large skeletons scattered on the ground...... The skull and ribs are clearly human!

"Why are there so many skeletons here?"

Moving to the skeleton pile, Lin Yu stretched out one arm and picked up a skull. Put it in front of your eyes and take a closer look.

The human skull is usually made up of 29 bones, which can be easily distinguished by just looking at the facial skull.

The skull that Lin Yu was holding in his hand at the moment, the mandible was missing, and the rest was still intact and was held in his hand.

The two pitch-black eye sockets were gloomy, as if they were looking directly at Lin Yu, a guest who was not sleeping.

There are eight skulls in this large pile of skeleton corpses, that is, there are eight skulls.

There are at least eight human corpses here.

Lin Yu swept his gaze, and now in addition to the skeleton, there were rotten clothes, flames, and traces of explosions.

Grabbed those few pieces of clothing and shook them gently, and the clothes that had long been almost rotten suddenly fell apart, and a few supporting bones fell out.

"What the hell is this place? There seems to be a big question. ”

"Where is the enemy? What is Shen Feng defending against? ”

Lin Yu, who was more and more puzzled, took down the sealed box behind him and put a few ribs and a skull into it.

After carefully inspecting the surroundings again, and after missing nothing, Lin Yu continued to walk forward.

"Ding! Bite! Bite! There was a continuous sound of tapping from the front.

Lin Yu subconsciously turned off the miner's lamp and carefully touched it.

Through the dim candlelight, you can see several snow-white skeletons digging with pickaxes in the corner ahead.

"Skeletons!" The voice was a little confused.

"Soul!" This time the sound was full of surprises.

Lin Yu never expected that this action would not only get a base, but also a lot of money to get a soul that is not constantly being excavated!

What do you want!

Lin Yu instinctively wanted to rush out and kill the skeletons that were mining.

But he forcibly pressed his steps, took out the left wheel and looked at it, and then looked at the skeleton's thin figure and body leaking everywhere.

Be a man who has never shot a shot, although he often touches and grabs, and shoots those slender auxiliary bones and skulls on his head with his crosshairs.

It seems somewhat unlikely, but the most likely is that the bullet passed through the gap in the skeleton's body and landed on the wall.

No matter how awesome the weapon is, it can't beat people, isn't it nonsense?

Lin Yu finally knew why Shen Feng wanted to buy a stab-proof suit? Shields and long knives are the most convenient to use against them.

Cold weapons or large-scale covering explosions are most useful for them.