The high ridge is vast and the low ridge is green, the young forest is bright and the mother forest is quiet, this is a vast and boundless mountain range, the environment of the coniferous forest shows that this is a cold zone, a tiger wanders in the mountain stream, patrolling its territory, without losing a low roar to warn everything around, a flock of birds are frightened into the air by this roar, they fly to the south, come to a river, the river flows slowly, and from time to time there are fish and shrimp on the surface of the water.

Suddenly, a wooden stick fell from the sky and plunged into the river, and the calm water suddenly stirred up a splash.

The stick was picked up slowly, with only some silt on it, and the stick stabbed the fish several times until there was no more fish in the attack range.

"Damn! It's too hard, isn't it? A teenager threw the stick aside, sat down on the ground, and sighed.

The boy was wearing a white research suit, which was too large for him to roll up his sleeves, and the sneakers on his feet had lost their original luster and looked dirty.

"No, if you don't catch a fish today to replenish some energy, tomorrow you will be even more weak, but fortunately, I am still on the earth now, and I didn't leave me in another world." The boy got up again, picked up the stick, no, it should be called the wooden spear.

The boy's name is Ma Qiang, the former researcher of the Chinese Academy of Sciences, born in the juvenile class of the University of Science and Technology of China, graduated from the bachelor's degree at the age of 17, graduated with a doctorate at the age of 24, and then did research at the secret research base of the imperial capital, but was inadvertently involved in a big scuffle caused by spies, in the melee, I don't know what caused the explosion, and when Ma Qiang woke up, he found himself here.

Ma Qiang still remembers that he seemed to have fallen from the sky, and then hung on a tree in a daze, and thanks to being on the tree, otherwise he would have either fallen to his death or been used as a snack by a wild beast when he was unconscious.

Well, there are definitely wild beasts in this mountain forest, and Ma Qiang knew this when he woke up and heard the howl of the tiger and the wolf.

When Ma Qiang woke up, it was dusk, and he didn't dare to go down the tree, and when he looked at the stars at night, he knew that he was still on the earth, but it was definitely not the original earth, and the evidence was that there were some subtle differences between the position of the stars and the location he knew.

For a short period of time, the stars in the sky seem to always be in his rightful position, but in fact, the positions of all the stars are constantly changing, such as the Big Dipper, if you go to see the ancient tombs of the Spring and Autumn Period and the Warring States Period, you will find that the shape of the Big Dipper recorded at that time is different from what you see now, and the reason is in the North Star.

The earth is not standing obediently as most people imagine, in fact, the earth is inclined to rotate, and his inclination angle is constantly changing, of course, this change is extremely slow, in the twenty-first century, Polaris is Ursa Minora A, but in 3000 BC, Polaris is Draco A, and in the first millennium BC, it became Ursa Minor, B, you know, Polaris has a special significance in Chinese culture, he also has a name called Ziweixing, that is, Emperor Star, So every time the position of the North Star changes, it will be interpreted as the displacement of the emperor, and now Ma Qiang sees the North Star is the North Pole Five, although there is no special instrument in his hand to measure, but according to the calculation of the position of the sun, Ma Qiang thinks that he should be in the era between the Han Dynasty and the Sui Dynasty.

In addition to the pistol that Ma Qiang had been holding tightly, there were also keys, various ID cards and mobile phones.

When Ma Qiang was sure that he had traveled through time and space, he chose to turn off his mobile phone as soon as possible, after all, in this era, charging is impossible, and turning it off now may save his life with the remaining power of this mobile phone in the future.

"No, it's too difficult to catch fish, so let's get tools first." Ma Qiang gave up the idea of catching fish with a wooden stick, don't look at the fish swimming leisurely, but without the right tools, you will be greedy, optical refraction and natural slippery body, it is really difficult to catch.

The best tool for catching fish is a fishing net, so there is a saying that it is better to retreat and build a net than to envy the fish in the abyss.

Or put a few more small spearheads on the wooden spear, so that you can increase the attack range, which is very in line with the strategic idea that our rabbits can't be accurate to one meter and expand the killing range by ten meters.

But it's better to use a net with a rope.

To make a fishing net, you need a rope, Ma Qiang searched for a while by the river, but did not find a suitable vine, and finally looked at the thatched grass on the side.

Rope has been used in human history for at least tens of thousands of years, and this tool made of plant fibers from grass or vines has almost no prerequisites, and can be said to be one of the best tools to make in the wild.

Ma Qiang first tried to pull out a few thatches, the thatch in the autumn and winter was extremely tough, a few thatches removed the head and tail, and then put together and rubbed vigorously, in less than ten seconds, the thatch was entangled with each other, becoming the simplest rope.

"It's okay, there is no way to simplify the rope, but you can use tools to save some effort by cutting the thatch." Ma Qiang looked around, found a few stones, and then tried to hit the edges.

The huge reverberation made Ma Qiang's hand numb, he looked at the red hand, where did he do this in the perennial ivory tower, although he knew the method, but it was really difficult to do.

"It's not going to take a few strokes, my hands have to have blisters, this won't work." Ma Qiang looked around, in this wilderness, if the blisters burst and cause infection, God knows what will happen, although the probability is very low.

Thinking of infection, Ma Qiang thought of another question.

"By the way, am I considered a meat wearer, all kinds of viruses in my body are two thousand years later, if this comes to human society, won't it become a super virus bomb?" Ma Qiang began to struggle as a scientist.

If he really destroys a large number of human beings because of himself, Ma Qiang is willing to choose to sacrifice himself, after all, he should not be in this world in the first place, and this sacrifice does not mean suicide, choosing a remote place to live a lifetime can be regarded as picking up a few decades of life.

"Forget it, don't think about it yet!" Ma Qiang shook his head, if you want to talk about tools, in fact, Ma Qiang can also choose to grind the key, but the material of the key is a rare metal, unless necessary, he doesn't want to use such a non-renewable resource.

"Ah, what a big mussel shell!" Ma Qiang suddenly looked up and saw a palm-sized mussel shell on the river, and his eyes lit up, the food and tools were all solved.

He hurriedly stepped forward and picked up the mussel shell, probably sensing that he was in danger, and the mussel shell was tightly closed, hoping to rely on this method to persuade the enemy to retreat.

It's a pity that he is facing human beings, and the last thing that human beings are afraid of is such a threat, looking at such a clam shell, Ma Qiang couldn't help but think of the poor pangolin, the ability to evolve for tens of millions of years, but in front of humans, it is so powerless.

The mussel meat in the mussel shell is rich in protein, but as a river mussel, it must also represent a great risk of parasites, and now Ma Qiang's problem is how to make a fire.

Or do the rope first.

Now that the tools are available, Ma Qiang picked up a few smaller mussel shells, first smashed one with a stone, thought about it, put it aside, picked up a mussel shell that was not smashed, and sharpened the edge with a stone.

The mussel knife is complete!

"I'm from the Stone Age." Ma Qiang tried to cut thatch with a mussel knife, although it was not fast, but it was much better than pulling it, and he cut a large handful of thatch after a while.

Then it's time to rub the rope, I rub, I rub, I rub.

Rope complete!

Looking at seven or eight ropes about one meter long, Ma Qiang felt that it was enough for the time being.

"Turn wood to make fire.... I'm so hungry... Let's start with an Iroquois-style fire-picker. Ma Qiang broke off a few suitable branches and began to make Iroquois-style firearms.

The Iroquois fire-taking device is the original ignition device invented by the Iroquois, he uses the wood to generate heat to make fire, but it is different from the traditional wood-turning, he uses two ropes to wrap around a wooden stick, the wooden stick is used as a rotating shaft, and a circular horizontal accelerator is added in the middle of the rotating shaft, and the other section of the two ropes is connected with a small wooden stick, and the small wooden stick is pressed down, the rope will rotate the rotating shaft, and then use inertia to restore the rope, and then go back and forth, you can quickly take fire.

Well, this is also a tool that doesn't require any preconditions, the only condition is probably the Anger circular horizontal accelerator, Ma Qiang found a thin stone, and slowly turned a hole with the key to act as this circular horizontal accelerator.

About half an hour passed, the Iroquois firearms were completed, and Ma Qiang's hands finally had blisters.

"Damn, it's still blistering, this Stone Age tool just isn't easy to use."

Despite the utmost care, Ma Qiang, who had never done rough work, still developed blisters.

"What the hell is going on in my body, I feel like I'm about the same as I was when I was fourteen or fifteen years old, is there still reverse growth in the crossing?" Ma Qiang habitually touched his chin, but the beard that inspired him was gone, and the smooth chin indicated that his body was definitely not old.

"Forget it, sir, let's be angry."

With the Iroquois fire, it is a simple matter to make a fire, the thatch ear hair is the best ignition, just cut the thatch when there is a pile left, Ma Qiang carefully gathered the thatch ear hair, and then found the stones on the riverside to build a small stove, and found some small sticks and large branches, this kind of thing is really everywhere here.... It's just too much, so much so that you can't find a way.

In fact, there should be no way.

Whew!

The shaft rotated rapidly, the bottom of the shaft and the spike feathers rubbed rapidly, and after a while, a puff of green smoke came out.

It's done!

Ma Qiang continued to spin for a while, waited until he saw the fire come out before stopping, carefully adding ear hair, then adding thatch, waiting for the fire to start, then adding small sticks, and finally a little larger sticks.

There is fire!

Ma Qiang looked at the small stove in front of him with satisfaction, fire is a good thing, it can even be said to be the origin of scientific civilization, if there is no fire, then don't think about smelting, there are no metal tools, and the development of science and technology is a joke.

It's finally time to eat!

Ma Qiang quickly put the river mussel he picked up before on the fire, and the river mussel quickly opened his door after feeling the enthusiasm of the fire, well, fragrant!

Smelling the smell of roasted river mussels, Ma Qiang swallowed his saliva, he was really hungry.

With fire, naturally you can not drink cold river water, Ma Qiang, as a later generation, but he knows the horror of various parasites hidden in wild rivers, and there is no way to drink it, even if there are conditions, he still has to boil water to drink.

How to burn? The mussel shell is the best pot, although it is a little smaller, but in order to drink clean water, Ma Qiang still thinks it is worth it.

Eating and drinking enough, although there is no salt, it still makes Ma Qiang feel satisfied.

Watching the green smoke slowly drift into the sky, Ma Qiang looked at the position of the sun, and before he knew it, it was noon.

Keep doing the rope!

This time, Ma Qiang learned to be obedient, and no longer used the rope rubbing method, but changed to the rope braiding method.

Braiding the rope is naturally slower, but the rope will be tougher and more durable.

Best of all, it's hands-free!

"Woooooooooo

A wolf howl came from a distance, Ma Qiang frowned and looked over there, this voice he had heard last night, but today it seemed to be closer.

Although Ma Qiang has a pistol, it is impossible to replenish the bullets, one less shot is fired, and the number of wolves is definitely more than his bullets.

Speaking of which, during this day, there were no beasts approaching, and Ma Qiang felt that his luck was not bad.

Before dark, Ma Qiang had to make a treehouse to come out.

In the popular science book "Five Thousand Years Up and Down", the first chapter is about the mythical story that opened the world, and the first person in the second chapter is Youchao.

In ancient times, people faced with the invasion of wild beasts, the first thing they thought of was to hide in a safe tree, and the beasts that could go up the tree were a few after all, which greatly increased the safety.

The construction of a treehouse is not simple, Ma Qiang knows that he will not be able to build a treehouse in the hours before dark, and he is ready to make a hammock.

The material of the hammock is the thatched rope, which is used as a fishing net during the day and a hammock at night, hanging on a tree, and the only thing that can attack you is pythons and poisonous insects.

Poisonous insects are unguardable, at most they will keep the smoke around for a while, as for the python.... Resign yourself to fate, Ma Qiang didn't think of any good way.

I still have to build a treehouse.

Thinking of these, the speed in Ma Qiang's hands accelerated again, and when the sky was dark, the *** bed was successfully set up, in order to make this hammock, Ma Qiang didn't have time to find something to eat at night.

Let's do it first, it's nothing to be hungry all night, Ma Qiang comforted himself and said.

When he came to the hammock, because he was worried about the solidity of the hammock, Ma Qiang specially found a place where there were no stones underneath, so that if he fell, he would not hit the stones and hang up, and even put part of the unused thatch on the ground where his head might fall, and the rest was covered by a quilt on himself.

Looking at the bright starry sky in the sky, Ma Qiang couldn't sleep for a long time.

I really came here inexplicably, how sad my parents would be when they knew that they were in that time and space, did those spies catch them, and why did they cross over?

With these answers, which could not be found at all, the second night after Ma Qiang crossed over.