"The country of a thousand times, its land is a thousand percent, and the total is nine billion steps. Ask how far it is? ”

This is an example problem of "Nine Chapters of Arithmetic", only a simple unit conversion and the opening of billions of digits, naturally it is difficult to be confused, he easily answered, "Three hundred and sixteen miles and sixty-eight steps." It can be obtained by direct prescription calculation. ”

"There is a sacred tree in the empty mulberry. At the beginning of the year, it is born by one zhang, and the next year increases by half a zhang, and it increases by half every year. Q, after a thousand years, what is its high geometry? ”

Without thinking, he replied casually, "Two zhang." ”

Qingyun stuck out his tongue and continued to ask, "There is a round house today, six feet next week, seven feet last week, and six feet high." Commissioned with new rice, the tip is one foot high. Q, what is the product of meters? ”

After hearing this question, Yu Zhi's face suddenly turned solemn, and he turned to Chen Wenzan and asked, "Ling Zun really instructed Brother Chen to solve these questions before he can leave home?" ”

Chen Wenzan nodded, "My father specially instructed that it should be approved by Mr. Otherwise, you need to be supervised by your husband and cannot travel far. ”

Yu Zhi sighed, glanced at the three of them, and finally stopped his gaze on the gourd pavilion.

I saw the latter smiling like a flower, with an innocent face, not at all like the appearance of being able to hide his thoughts.

I hope I'm too worried, and I muttered to myself in my heart, "I can't solve this problem, Brother Wenzan still needs to ask my father for more advice." Today's matter, I am also powerless, and on the trip to the north, Brother Wenzan is afraid that he will miss it. ”

Calculating the volume of the cone and column was originally difficult.

But looking at the world, it can be solved actuarially, and the grain of rice is not bad, but it is only the number of ten fingers, and I am afraid that half of it has fallen on the ancestral family.

Chen Daoju was afraid that it was some inconvenient reasons to explain, and he knew that he couldn't stop Qingyun this time, but he wanted to keep his son Wenzan at home.

Zu Yuzhi often goes out to surveying and mapping with his father, collects medicine and alchemy with his master, and walks around a lot, not like Qingyun is still a young child who doesn't know the world.

He secretly thought in his heart that the changes in the Tan Palace back then, in the final analysis, were a sectarian infighting.

Therefore, it is difficult to go to Wei Diji, and the gourd Caiting who has an unknown teacher cannot be trusted.

Perhaps Uncle Chen and his father had already been aware of today's situation, and Uncle Chen had already guessed that Qingyun would come to him when he left the scriptures, and his father "happened" to plan a trip to the Northern Wei Dynasty for himself, which was a kind of entrustment.

Thinking of this, an apologetic smile appeared on his face, as if he was still thinking about something that could not be solved.

Unexpectedly, Chen Wenzan was very free, "Hey." I don't know how to do swordsmanship, and it's a burden for you to carry it. I'll still ask Mr. Zu for advice and make up for this brain first. My father also hoped that one day I could use this to make a name for me and make a living. ”

Gu Caiting pursed his mouth and slapped Chen Wenzan's head hard, "Your brain, it's to make up!" Read more books, maybe you can be an emperor! ”

Chen Wenzan tilted his head and choked angrily, "Cut, the teacher who met me last time calculated a hexagram." said that my fate is secretly in harmony with the respect of the Ninety-Five, and the blessing is long, and it should not be too far from the dragon chair. Mr. Huayang's hexagram has always been very accurate, brother, don't you say? ”

Zu Yuzhi was also very helpless about his optimistic heart, spread his hands, and the corners of his mouth rose slightly playfully, "I hope this time is also accurate!" Master also said that I can marry a princess. To be honest, except for numerology, I obey Mr. in everything. ”

Cai Ting rubbed his shoulder on Qingyun's arm and asked mysteriously, "Did that Mr. Huayang calculate your fate?" ”

Qingyun shook his head slightly, "Uncle Chen said that easy learning is the way of life, not a technique to avoid evil, so ......"

Chen Wenzan snorted coldly, "I brought my father out again, and my father also said that Mr. Huayang is not an extraordinary person, and hearing his words is better than ten years of dry study." ”

Then he squeezed his eyes and said to Caiting, "He is afraid that his fate will be too grotesque and scare you." Mr. Huayang said that the Qing brothers are the appearance of 'Nine Dragons Winding Pillars'. He is that pillar, the pillar of the world, and he will meet many nobles with true dragon fate around him in his life. Oh, I'm the first. Haha~"

The bond with the true dragon's destiny, meeting one, for ordinary people, it is a blessing for three lives.

Kowloon around the pillar? What kind of evil is this guy?

Gu Caiting muttered to himself in his heart, okay, now Luo Jinghu is in the dragon pan, and the dark tide is surging, maybe this fledgling hairy boy is the lifeline to break the game?

And what about their own fate? What about the fate of the people?

Ay? Nine dragons around the pillars, even if the emperors of the northern and southern dynasties are counted, it is far from enough, is it that outside of Middle Earth, the future emperors will be intertwined with his fate? So......

"Hey, what do you think? Are you really scared? ”

Looking at the surprised gazes cast by the three of them, Gu Caiting knew that he had just lost his temper, so he said perfunctorily, "I think I'm a little tired, I've been running for a day, and I haven't rested." I'm going to have to hurry tomorrow. ”

With a knowing smile, he placed the gourd pavilion in the bedroom at the back of the courtyard to rest.

This stargazing pavilion is not a place for guests, there are no guest rooms, and the three big men can only spend the night in the pavilion.

Early the next morning, the gourd pavilion was woken up by a rapid sound of gold, and in the haze, I saw that the interior was full of glory, seven colors were bright, and several pillars of light gathered to a metal pillar on the inner side of the gable, reflecting a blazing white light, teaching people to not be able to look directly.

Cai Ting was surprised and surprised, and suddenly woke up, and the pillars of light suddenly disappeared, replaced by a soft natural halo in the morning light.

The three people in the pavilion talked a lot last night, and they were still in a dream at this time, but the gourd Caiting rushed in shouting all the way like being beaten with chicken blood.

The three of them rubbed their sleepy eyes reluctantly and smiled wryly.

"Well, I said she would come early in the morning to wake us up so you could go to bed early last night." ”

Qingyun laughed, "She's a lot more nervous than when I first saw your damn things. ”

"Are you all looking at my jokes with pure heart, so you don't remind me to beware of those weird mechanisms?" Gu Caiting's face was gloomy, and his two willow eyebrows were raised, just like a pair of scimitars, as if he would cut off if he didn't agree with him, obviously angered.

Yu Zhi waved his hand, "Don't you dare to look at the girl's jokes, but if you warn you in advance, there won't be that sense of mystery, wouldn't it be a lot of fun?" It's just a little trick that urges me to get up and dance the sword when the weather is nice, and it's not worth it to put it bluntly. ”

Gu Caiting knew that the other party had no malicious intent, and with curiosity surging, his anger diluted, "How did you do that?" Those light curtains, or ...... Pretty pretty. At this time, when the sun is rising, can it automatically sense the sun? ”

"Sort of.

When we were making the dome mirror, my father and I took some leftovers and grinded them into eight condensers and hung them under the eaves of the east window.

On a sunny day, when the sun rises, these mirrors focus the daylight on the lead rods of the gable.

There were actually two lead rods, and the other was in the next room.

The two lead rods are basically the same height, and there is a wooden trough with an open end and a copper bead in the trough.

Usually, this wooden trough is slightly inclined to the closed end, and the copper beads cannot roll out.

However, concentrating light can generate heat, and the lead rod will elongate a little when heated.

In this way, when the sunlight comes in, it raises the closed end of the wooden trough, and the copper ball rolls down from the opening on the other side, smashing the copper plate underneath, making a sound.

When all the copper beads fall into the copper plate, the mechanism will be pressed to retract the condenser, stop heating, and the temperature of the two lead rods will gradually return to equilibrium.

And every night, when the big device is discharged and reset, it will trigger the mechanism to drop the condenser, and fill the wooden trough with the recovered copper beads, waiting for the next sunrise. ”

Gathering light to generate heat, and lead to rise with heat, these principles are too unfamiliar to the gourd pavilion.

Although she only heard it in the clouds, she also believed that the mystery in this pavilion was like a miraculous axe, and she could only be in awe. "I, let's get out of this place as soon as possible. Every step here is a trap, and a wrong step is a scare. The lights in the corridor will go out by themselves, the incense will burn spontaneously, the tea will cook itself, and even the toilet will be cleaned by itself......"

"It's not difficult, in fact, we just need to find the actions we are used to to triggering, such as opening and closing the door, sitting and standing, ......"

"Stop! This girl just wants to go now. So she went away, and ran out without looking back.

"Go ahead, I'll help Mr. watch the Stargazing Pavilion." Chen Wenzan waved his hand at the two, as if he had made a very pleasant decision.

"That's all it takes." There was a junior to help record the star map, and he naturally couldn't ask for it, so he finally let go of the last thing on his mind and said goodbye with Qingyun.

It is said that the three young people walked all the way, and they couldn't break their tongues.

Especially Qingyun, who first knew his life experience, kept asking about the situation of his own door and the general trend of the rivers and lakes. Caiting and Tsukizhi also know what they know, and they take the trouble to explain.

Regarding the Five Swords Sect in the world, it has been said in ancient times.

According to legend, the five emperors established the country with martial arts, and each passed on its secrets.

Yellow Emperor Xuanyuan Sword,

Red Emperor Male and Female Sword,

Qingdi Xingjian,

Black Emperor Xuanwu Sword,

White Emperor Spirit Ape Sword,

And for the five sects of antiquity.

The Xuanyuan sword of the Yellow Emperor was once lost, and when the Chu and Han dynasties fought for hegemony, King Xiang got his remnants and was proud of the overlord sword.

Sun Jian of the Three Kingdoms and Xi Overlord fragments, until his son Sun Ce, Sun Yi died, and the essence of Xuanyuan Sword has been lost.

Xiliang Majia Ma Mengqi's method is domineering and fierce, similar to Xuanyuan, and he is one of the Five Sword Sects, which is for the Western Sect.

However, since the death of Ma Chao, few people who practice this method have big weapons, and among the five sects, they are gradually declining.

The sword of the Red Emperor was passed on to the Liu family, from Liu Bang to the head of Liu Xian, the Han Dynasty was formed for five hundred years, this sect is a national art, and its prestige is long, as if it is the head of the five sects.

After the death of the Song Dynasty, the ninth prince Liu Chang fled north to Wei and was named the king of Song.

Although this Song King is a false title, Liu Chang built another snake villa, and claimed to be the master of the Liu family, compared with the imperial family back then, the status of the rivers and lakes has increased unabated, so he can claim to be the authentic sword sect.

The sword of the Blue Emperor has the righteous warrior Bian Suizhi, and Bian Suiben was the first general in the last years of the Xia Dynasty.

Tang attacked Xia Wei, first made peace with Bian Sui, so the king of Shang won the world, and wanted to let the world follow Bian, so he refused to die.

Shang Tang felt its high righteousness and took Bian's sword as its national skill.

This branch has been declining since its demise, and it has re-emerged in Bian Zhuangzi, calling for the law of strife.

The Spring and Autumn Guards have many habits, and there are many tribes that have been transmitted, collectively known as the Eastern Sect, among which the Nie family and the Xiao family are the leaders.

The Black Emperor turned into a true martial artist, and the secret was passed on to Taoism.

Since the Han Ma Ming created the lightning method, it has been passed on to Yin Changsheng, prosperous in Wudang and Qingcheng.

Today's suzerain is the teacher of Zu Xuanzhi - Mr. Huayang Tao Hongjing.

Although the momentum of the Taoist Sect is not as strong as that of the Snake Slashing Villa, Tao Hongjing's own swordsmanship is the best in the world, which is the consensus of the rivers and lakes.

And Mr. is both ancient and modern, the number of Qimen, Danshi Qihuang, forging and smelting, everything is refined. Therefore, the rivers and lakes are also reluctant to let three points of thin noodles and Taoism.

As for the line of the White Emperor, because the White Emperor was expelled in the past, there was no heir, and only murals were left to explain his sword intent.

There is a psychic ape, and the painting exercise has made it see the light of day.

The spirit ape passed on to the Yue Nu, and the Yue Nu once taught the Yue National Teacher.

After the Yue State was destroyed by the Chu State, some clansmen fled north to Qilu, and the Yue Nu Sword was therefore transmitted northward, and Qi rejected Chu with Tanzi, and Xuan He was for a while.

King Qi Wei placed Ji under the school palace to give gifts, and it was a great success, so he imitated its system to grant the sword, worshiped Tanzi as the king of heaven, and there was a Tan Palace.

The result lived up to the expectations of the king, the Tangong peach and plum world, when the world was in its heyday, the world's swordsmen were half out of this vein, and there was a saying that the world's swordsmanship was out of the Yue girl.

The second Heavenly Monarch of the Tan Palace gathered to create the rise and fall method, condensing the essence of the sword intent of the Yue Nu, and only for the internal transmission of the Qi royal family.

Wang Ju is the merit of Tanzi and calls himself Tanjun.

After that, the lords of the Tan Palace were all from this custom, and the title of Tan Jun could only be inherited by the branches of the Qi royal family.

Among them, the surnames Tan and Wang account for most of them.

Among the Tan monarchs, Wang Jian, the fourth generation of Tan Jun Wang Jian, who served as the national teacher of Jizi State, Wang Yue, the 27th generation of Tan Jun Wang of Cao Wei Guoshu Teacher, and the 36th generation of Tan Jun Tan Daoji, a famous general of the Southern Song Dynasty, are the most famous.

After the death of Qi, there was no Tan Palace, but the descendants still called themselves Tan Zong.

and the fall of the Southern Song Dynasty, and Tanzong was purged in the Southern Dynasty.

There is simply Qingyun's father, that is, the thirty-eighth generation of Tanjun Qing Yihan, who led the disciples to reunite into forces in the Northern Dynasty.

The Tuoba clan of the Northern Dynasty was a Xianbei Hu people, and Qing Yihan did not want to see the country being usurped by Hulu, so he followed the will of his ancestors and assassinated the King of Wei, but unfortunately he fell short and caused his annihilation.

Since then, Tanzong has become a rebel party in both the North and the South.

More than ten years ago, the people who escaped to the south could only live a secluded life like Chen Daoju.

Although the people of the world still respect the Eastern Sect's Attack Method, the Tan Sect's Rise and Fall Method, the Sword Sect's Gu Ying Method, the Daoist Sect's Lightning Method, and the Western Sect's method of making the world's five sects.

However, the two veins of the Tan Sect and the Western Sect have been silent for a long time, if it were not for the fact that there were no outstanding sword sects rising in recent years, the two factions only relied on the legendary prestige, and it was very reluctant to maintain the status of the sect.

"My father's generation also laughed at the rivers and lakes back then, how could I watch the glory of this sect for 700 years fall to my generation! I want to complete my father's will, stab King Hu, restore the river and mountain, and strengthen my Tanzong! ”

Qingyun used to live in seclusion in a corner, not knowing the troubles, but at this time, when he first knew the old things in the rivers and lakes, he couldn't help but surge sharply, and his chest was undulating.

If no one pulls the reins, this kid is afraid that he will get into trouble, and Zu Yu is already thinking like this, "Brother Qing, don't be rash."

When Ling Zun was alive, Tanzong's momentum was flourishing, and this matter could not be done.

Now the crowd has no leader, and there is a lot of waste waiting to be revived.

And the Empress Dowager Feng of the Wei Palace has died, Tuoba Hong holds the authority alone, cleans up the corruption, reforms on a large scale, the national strength is prosperous, and the prestige is long.

There is no hope for the other.

If it fails, the individual's life will still be small,

But the remnants of the Tan Sect will inevitably have to endure a storm again, and it will be even more difficult to rise in the rivers and lakes again, won't Brother Qing become sinners? ”

Qingyun's eyebrows furrowed, knowing that what he said was reasonable, but he had never encountered such a major decision before, and he didn't know how to weigh it.

"Although Chu has three households, the death of Qin will be Chu! Brother Qing, I'll support you! ”

Cai Ting hooked Qingyun's shoulder, patted it lightly a few times, his eyebrows were bent like a string moon, and a flower-like smile bloomed in front of Qingyun's eyes.

The orchid incense that he spit out seemed to have gone around his throat and seeped directly into his heart.

Qingyun's heart was already a raging fire, and at this time, there was a stream of heat erupting from the bottom of his abdomen.

What kind of rhetoric, gambling and vows, as if they had been chewed and puffed in their mouths, they poured out.

Sects, Hualu, Jiangshan, and righteousness are all just ashes that are blinding.

And the real torrent behind him was still suffocated in the lower abdomen by Qingyun, and it was not revealed with sonorous words.

Seeing this, Zu Yuzhi could only shake his head.

Tanzong's matter, he was originally an outsider, and it was not appropriate to persuade him at this time.

What's more, it is mixed with the blood of Fang Gang, who is just beginning to love boys and girls, if he is persuaded again, I am afraid that he will not even be able to sit still in the position of brothers.

Now that the situation is turbulent and the ringing horses are rampant, several people first chose the waterway in order to be safe.

But the ship has been done for a long time, and if it is not grounded, it is inevitable that it will be boring.

Caiting couldn't sit still at first, and he was bound to buy a horse in Xuzhou and take the official road.

"I'm not a new debutant,"

Gu Caiting glanced at Qingyun intentionally or unintentionally, and the latter could only pretend not to know, "I have been running business with my parents since I was a child. When I arrived in Wei, there was no need to worry about it. There is a business in Xuzhou that has a lot of dealings with my parents. I can ask him to help us buy a few Wei military horses with imprints, those Jianghu Xiao saw it, and he didn't dare to make up his mind. ”

Seeing that she was serious, she also acquiesced.

"Senior Brother Qing, this Xuzhou is a dragon's lair. In the past, Peng Zu founded the country, Chu and Han fought for hegemony, Sun Cao and Liu Tianxia were divided into three points, and now the Song and Qi families of the Southern Dynasties, during which the emperors were not unrelated to Xuzhou. Your Nine Dragons Circle Pillar, if you hover more here, you might be able to catch a few real dragons. ”

"Senior sister, you are making fun of me again." Although Qingyun pushed and shoved in his mouth, there was no look of danger on his face.

"It's like there's something big going on ahead, so lively. This battle is rare in Guangling. Unless it weren't for the reminder, neither of them would have paid attention to the dense crowd at the street entrance.

The wayfinder asked what was going on, and it turned out that it was the monk of the Little Dragon King Yuan who was recruiting martial artists to teach.

Xiaolongwang's father, Jiangyang King Tuoba Zhong Kui, known as the first warrior of the Tuoba clan, was in order to quell the Gai Wu rebellion, and entered Zhongnan alone, and there was no news again, but the Gai Wu rebellion has since disappeared.

A pair of young sons left by King Jiangyang were adopted in the palace and met very well, but for some reason they did not divide the crown after the ceremony.

Yuan Dharma monk was only named General Longxiang, so he called himself the Little Dragon King.

It is a felony for the royal family to use the royal title privately, but the generation of the little dragon king on the family tree is quite respectable, higher than the current two generations, and Tuoba Zhong Kui is one of the best warriors in the clan.

Therefore, now he treats the Yuan monk extraordinarily, and he does not think it is wrong, and even he has used this title in informal occasions, and the name of the little dragon king can be regarded as solid.

The little dragon king has had the style of his father since he was a child, and he is fond of martial arts.

Emperor Wei Tuoba Hong promoted the Han surname, Yi Tuoba was the Yuan surname, and the Yuan monk was the first to support it, just because it was easier to get close to the people in the rivers and lakes with the Han surname.

In recent years, he has hired martial arts teachers with high salaries, if he doesn't have the ability to eat or has a selfish heart, the end will naturally be extremely miserable.

But even if he teaches each other wholeheartedly, with the understanding of this little monster, he will be able to come out of the blue in a few years, and beat the teacher to death or injury.

Everyone knows that this errand is a hot potato, even if the remuneration is high, the characters who don't have a few catties dare not respond, so every time they recruit a teacher, they will attract a crowd of curious people, but it has become a grand event, but it is a cheap businessman.

"This little dragon king is so arrogant, who else will apply?" Qingyun Qidao.

"Hey, this little brother doesn't know anything.

Today's Xuzhou Thorn History is the owner of the Snake Slashing Villa, Liu Chang, the king of Song, and the Yuan monk originally came to him.

And King Song naturally didn't want to accept this thorn, so he called it sick and shirked it.

But although he shirked it, he dared to turn a deaf ear, so he could only use the relationship between the rivers and lakes to find some strange people and select capable people for the Little Dragon King to choose.

The referees selected this time were Liu Chengwu, the son of King Song of Song, the young owner of the Snake Villa, who represented the initiator of the rivers and lakes, Yuanyu, the king of Guangling who represented the Great Wei clan, and the little prince himself. ”

"King Guangling, your father's land has been sealed out by Emperor Wei." Qingyun gently pushed Zu Yuzhi with his elbow and whispered.

"It's rare and strange, and now the states and counties controlled by Wei are not a few who have been divided and led by Yao in the Southern Dynasty. Keep watching your excitement! ”

Qingyun and the three of them were all martial arts practitioners, so they found a higher building and climbed up.

It seemed that a lot of colleagues had gathered on the roof of the building, and everyone looked at each other, so they turned their attention to the field again.

Qingyun stretched his neck and looked carefully, seeing that there were still four people who had not been eliminated, and each of them looked unfathomable.

One of the tower-like strong men walked out first, and sang a roll call, "Pei Dul, the big stele opener, is ugly to the little prince!" ”

》》》》》 time to knock on the blackboard《《《《《

Since the heyday of the new school of martial arts pioneered by the three heroes of Jinliang in the fifties, the description of swordsmanship has been created incomprehensibly. Some are simple and slaughtering, and some are imaginative, which attracts countless readers.

In this work,The description of swordsmanship deliberately goes a little more retro flavor.,Courage to trace the origin of the sword.。

The so-called kendo was first published in "Wu Yue Chunqiu". The land of Wu Yue is good for sword fighting, the famous sword, and the swordsmanship of the Yue women is spread all over the world.

Fending and sword dancing are already common accompaniment programs during the banquet, and the well-known story "Hongmen Banquet" is a portrayal of the swordsmanship culture at that time.

Since the beginning of the Han Dynasty, there have been some famous swordsmen in the official history, such as Worm Da and Wang Yue.

Around the time of the Song Dynasty, taolu martial arts began to prevail. Taolu martial arts is an important part of traditional Chinese martial arts, mainly to train autonomic nerve responses, similar to our modern training for driving and typing. Between winning and losing a high-speed confrontation, the vast majority of reactions are not made after the brain thinks about it. Therefore, taolu martial arts is not dross, but in the actual technical confrontation, it is impossible to get rid of the constraint of physical qualities such as strength, speed, and hitting resistance, and physical fitness is the core of modern competitive martial arts sports.

It was also in the Song Dynasty that the island country on the other side of the sea began to sprout, and the "one-knife stream" based on training and chopping methods had just appeared.

The full flowering of Japanese swordsmanship was during the Ming Dynasty in China. In the military sketch "Formation Chronicle" of the Ming Dynasty in China, it was recorded: The sword is also skilled. The law has a sword scripture, and the art has a swordsman, so it is unpredictable. Dozens of people who know it, but Bian Zhuang's twisting method, Wang Ju's rise and fall method, Liu Xianzhu's Gu Ying method, Ma Mingwang's lightning method, Ma Chao's method, and the sword of its five families, Yong or there are legends. This is what scholars seek carefully, and they have their own secrets.

We can see that there were dozens of swordsmanship in China at that time, and the five ancestors were the greatest. Among these dozens of "small sword species", there are also such as Wudang sword, Taiji sword, Dharma sword and so on, which were completed in the Ming Dynasty. The martial arts classics that we are blowing with amazing skills now have to respect the five ancestors, so how impressive should the demeanor of these five ancestral swords be?

Therefore, the basic setting of the kendo sect in this work is based on the five ancestors of the sword sect.

P.S. mentioned the use of mechanical lifts in the first chapter of this work, and some readers left comments questioning the feasibility of mechanical lifts. In fact, based on the height of a two-storey building, a mechanically driven elevator is absolutely achievable. It is only necessary to use the mechanism to cut off/establish the connection between the elevator and the heavy object. Go upstairs and rely on the weight to land on the ground to do work, and go downstairs to rely on the friction damping of the heavy object moving in the track to slow down. Of course, due to the conservation of energy, the weight of the heavy objects carried downstairs will be less than the need to go upstairs. But that's okay, the Stargazing Pavilion has a hydraulic device that triggers a mechanism to hydraulically fill the elevator when it falls and touches the floor.

Most of the writers you see are literate, and they are sophisticated in industrial design, which is really difficult for them. Fortunately, the author is from a science and engineering background, and has 20 years of manufacturing experience certification, do you dare to say that the ancients could not make advanced devices with limited technology? Inexistent! Don't rely on crossing, go to the sky and go to the ground, and black technology is everywhere. All the black technology mentioned in this work,Either there is a source,Or there is a reasonable feasibility analysis,Let's put it here.,Welcome to kick the field!