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 As the saying goes, bit off more than you can chew.
 After getting excited, Kangchi did not immediately build an aircraft carrier. Instead, he placed an order online and purchased a batch of optical plastics and aluminum powder needed for coating.
 It’s more realistic to be honest and rub the lens first.
 Next, Kang Chi still has an important question that remains to be solved.
 How to get mastery points?
 This is a good thing, it can save an unknown amount of research and development funds!
 Unfortunately, Kang Chi couldn't figure out the reason after studying for half an hour. As the sky got darker, he had no choice but to pack up the shop and prepare to go home.
 "Hey, it's another bad day for income."
 When it closed, Kang Chi couldn't help but lament that business is not easy to do now.
 However, it is normal to be closed for a day for equipment maintenance.
 These equipments are generally valuable, and most of them are provided like fathers after buying them. How can they be damaged easily?
 Compared with repairs, reselling second-hand goods can make money faster.
 But Kang Chi didn't like this kind of reselling and speculation business.
 Just like he looked down on those anchors who graduated from prestigious schools but went to live broadcast and sell goods,
 If you obviously have a craft, or are intellectually talented, but if you do something that you can do just after graduating from junior high school, wouldn't it be a waste of the cultivation that the country and society have given you?
 Isn’t it good to make the money you deserve?
 On the way home, Kang Chi bought a meal for one person at Wallace, ate while walking, and had dinner on the way when he got home.
 The first thing I did when I got home was to take out the upgraded lens, sit down at my workbench, and start disassembling and analyzing the lens.
 Although I feel that the structure of this manual fixed-focus lens is definitely not very complicated, for the sake of safety, Kangchi will take photos and records every time a part is disassembled.
 After a while, the table was filled with various parts and small screws.
 This structure...
 It’s much more complicated than what he did himself!
 After completing the preliminary disassembly, Kangchi already had a certain understanding of the structure of the lens.
 The next step is to draw drawings of these parts and conduct further detailed analysis.
 To understand a product thoroughly, you must know what it is and why it is so.
 As time passed slowly, Kang Chi's eyes became brighter and brighter.
 Although there is no laboratory verification or precise digital simulation calculation, Kangchi has obtained a lot of inspiration and inspiration from the order and parameters of the optical components.
 It's just that this kind of epiphany comes more from a craftsman's intuition and lacks systematic and scientific argumentation.
 “There’s still a lot to learn!”
 Kang Chi sighed, put away the drawings, and ordered a few basic optical books online.
 After doing all this, he reassembled the lens based on his memory and understanding of the drawings.
 call--
 As the last screw was tightened, the lens was successfully assembled and the familiar panel appeared again.
 [Item: Daqin Optics 50mm F1.4 lens]
 [Manufacturer: Kangchi]
 [Item level: 2]
 【Experience: 135/400】
 [Mastery Points: 0.3]
 [Item status: intact, parsable]
 etc?
 "Mastery point 0.3?"
 Kang Chi suddenly became excited when he saw a number on the panel change.
 After using the only mastery point in the afternoon, the number has always been 0, but this time it became 0.3...
 Is this mastery gained through learning or dismantling?
 Kang Chi immediately found a copy of "Mechanical Design: Basic Principles, Drawing and CAD Technology" and read it carefully.
 Half an hour later, Kang Chi picked up the camera and looked at the panel again.
 [Mastery Points: 0.31]
 It really works!
 But what the hell is 0.01?
 Good study encouragement award?
 emm~
 Or maybe it’s because I didn’t watch it carefully enough and learned too little?
 Next, Kangchi conducted a very serious disassembly and assembly of this lens.
 [Mastery Points: 0.33]
 This is okay, and it seems to increase a little more than reading a book.
 In any case, Kang Chi finally understood the system!
 As long as you gain new knowledge through learning, or gain practical experience through manufacturing, maintenance, etc., you can increase your mastery points!
 Kang Chi put down the camera happily and couldn't help but yawned.
 Looking at the time, it was already twelve o'clock before I knew it.
 The body is the capital of revolution, and with Golden Finger on the verge of making great achievements, he doesn't want to burp again.
 Kang Chi immediately went to wash up and go to bed to recuperate for the next day's battle.
 The next day.
 A faint morning mist filled the streets, and the whole city seemed to be still asleep.
 Several groups of extras who got up early but were not selected by the crew were still squatting on the roadside, eating steamed buns, and eagerly looking at every person and car passing by.
 Once upon a time, Kang Chi also wanted to be an actor, but as he grew older, he lost interest in this kind of gambling-like career.
 Especially after experiencing the rise of short videos and live broadcasts, I am even less interested when I see the mess after the tide recedes.
 I'm an honest person.
 Working hard is the traditional virtue of the Chinese people!
 Kang Chi silently gave himself a thumbs up, opened the store and started a new day of business.
 Except for a few equipment rental stores that are staffed 24 hours a day, Kangchi is probably the first to open on the entire street.
 Mainly, he goes to bed early and wakes up early naturally. He is single, so what else can he do besides coming to the store early to knock around?
 Just after Kang Chi finished rubbing a 50mm fixed-focus lens, a delivery boy knocked on the door and walked in.
 "Boss Kang, your express delivery."
 Kang Chi quickly stopped what he was doing, took the express delivery and looked at it. Sure enough, it was the materials ordered yesterday.
 Although we are looking for suppliers in the same city, the efficiency is worthy of praise.
 "Thanks, can you wait a moment? I just have a lens to send."
 Seeing the courier boy nodding, Kang Chi quickly packaged the lens he had just cut out and sent it to the Academy of Fine Arts student.
 After the courier boy left, Kang Chi immediately opened the package. After confirming that the materials inside were OK, he began to try to make a double achromatic lens in front of the workbench.
 The optical resins he ordered were all in square form. The first thing to do was to grind out the shape of the lens, then polish it, coat it, and finally glue the concave and convex lenses together.
 This process may not sound difficult, but it is extremely difficult in practice, especially polishing the curved surfaces of the convex and concave lenses to a perfect fit, which is a test of your skills.
 If we follow the normal production process, this should be done using high-precision processing machine tools, or using high-precision grinding tools to directly reshape the material.
 But Kang Chi doesn't have this condition now and can only rely on hand rubbing.
 The main thing is ingenuity!
 After marking the material with a pen, Kang Chi skillfully turned on the grinder and started making lenses based on the drawings drawn last night and his own experience.
 For the first time, two pages of paper can fit into the gap between the two lenses.
 The second time, more than a dozen bubbles appeared during gluing.
 The third time, the fourth time...
 After more than a dozen attempts, Kang Chi finally succeeded in getting a double achromatic lens!
 He excitedly picked up the lens and saw a panel popping up on it.
 [Item: Double Achromatic Lens]
 [Manufacturer: Kangchi]
 [Item Level: 1]
 [Experience: 0/100]
 [Mastery Points: 1.35]
 [Item status: intact, parsable]
 I actually got a full 1 mastery point, which is simply wonderful!
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 Kang Chi was originally just a maintenance worker, but suddenly got the "item upgrade system". 
 As long as you make it yourself, you can upgrade it! 
 "It's a little unrealistic to rub an aircraft carrier with your hands for the time being, but isn't it easy to rub a lens?" 
 So starting from rubbing the lens by hand, far-leading technologies were introduced one after another. 
 "What do you think is a strong country?" 
 "The enemy retreated thousands of miles and did not dare to cross the pond." 
 “People all over the world are learning Chinese, translating Chinese papers, and reading instructions are all in Chinese characters.” 
 "I am a street sweeper. All I know is that Master Kang has made things cheaper for us, and we can never spend all the money we have. Everyone is happy, so with him, the country is strong!"
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<div class="content">
 As the disaster approaches, a special shelter called "Bonfire Company" wakes up from its slumber and sends out invitations to people - 
 "When night comes, someone should light a fire and shine it in all directions." 
 At the same time, it also brought a prophecy. 
 In 2044, at the end of the year, a dark disaster will fall from the sky.
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 He died on the wedding of the girl he had a crush on, after a long and successful career. After convincing Yama to send him back to the world, he decides to fix the areas in which his life went wrong. Realizing the lack of love and romance in his past life, he sets out to conquer the hearts of various women.
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 Here, only those with spiritual roots can cultivate while those with mortal roots are destined to stay mortal.
 Mo Wuji only has mortal roots, but will he only remain as a mortal?
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 T virus, black light virus, Zerg gene, alien gene… 
 I am a businessman, so I love peace. 
 Spiderman? 
 I happen to have a lot of little bugs too. 
 Team America? 
 Come and wrestle with my tyrant. 
 Thor? 
 See how my Goliath is. 
 Hulk? 
 Come on, see if your infinite anger is more powerful, or if my black light infinite devouring is better! 
 From the moment I appeared, I believed that the rules of the world would eventually be made by me. 
 Noah’s three principles: 1. Don’t take the initiative to do things that are harmful to nature. 2. Do not use people other than the enemy itself as a bargaining chip. 3. For the sake of the family, all of the above can be given up. 
 So, don’t mess with me! 
 …
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 Good news: Someone picked up a parchment with words popping out of it. 
 Bad news: that person is not me. 
 Good news: the old man downstairs can see the countdown to death above other people's heads. 
 Bad news: Grandpa is dying. 
 Good news: The landlord's daughter was reborn with future memories 
 Bad news: I'm still in the dark. 
 The reality is getting weirder and the game situation is constantly changing. 
 The game "Seeking Magic" was launched, Fang Yu entered the game, and found that there was no health bar displayed in this game. 
 And he can see the blood bar! 
 [Big demon: 1/21999. 】 
 "Let go of that monster, let me do it!" 
 [Tianyahu: 29481/29482. 】 
 "Brothers rush to the ducks! Disastrous! Whoever picks up the head counts!" 
 Fang Yu yelled as he stepped back. 
 ... 
 There is also an old book masterpiece "Weird Flow Cultivation Game" with 2 million words. 
 The innovative novel "This Game Is Not Simple" is 400w words, welcome to read.
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 Applying for computing power support... 
 The celestial supercomputing platform "Daode Tianzun" joins the calculation matrix... 
 Opening the Supreme Arsenal "Lingxiao Palace"... 
 Calling the "Nantianmen" super-time and space combat platform... 
 Delivering the command tower armor "Haotian God"... 
 One hundred thousand "heavenly soldiers" have been assembled... 
 The general-level autonomous mecha "Tota Tianwang" is about to deploy the "Linglong Tower"... 
 The planetary fortress "Twenty-eight Constellations" is about to perform beyond-visual-range firepower delivery... 
 High-dimensional life fluctuations are detected... 
 Upgrading to the thirty-third level of Taiqing Realm Dachitian... 
 Upgrading to the thirty-sixth level of Daluotian...
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 Gu Nianzhi had no idea how to get the aloof and handsome Major General to fall in love with her.
 His eyes were dark and serious. “…Seduce me. If you can do it, I’m yours.”
 Gu Nianzhi: “!!!”
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 Travel through the parallel universe and discover that there is a palace of reincarnation in this world. Everyone can enter it and travel through the wonderful worlds of science fiction, martial arts myths, and magic and witchcraft. Explore these unknown and wonderful worlds, thereby gaining strength and many magical props. 
 However, Qin Moyu was shocked to find that these so-called magical worlds were just those movies and TV shows from his previous life, weren't they? 
 The new book "I Can Access the Internet in Daqin" is being released...
 <div class="author-novels">
 <h3>Author's Other Novels</h3>
 <ul>
 <li><a class="title" title="Plane Master Copy" target="_blank" href="/en/serie-1195/plane-master-copy">Plane Master Copy</a></li>
 </ul>
 </div>
</div>

<div class="content">
 Wang Xuan entered Longmao Plaza and was trapped inside. When he finally left, it turned out... 
 This is already the last building on earth. 
 ———— 
 Seven works have been completed. Friends who are interested can check it out.
</div>

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 In the year 2139, the world changed. Fundamentally and irrevocably.
 Everything happened too quickly. The sky cracked like an egg and armored dinosaur-like monsters lurched out of the fissure. The split, though small at first, quickly widened. Within a few short hours, these beasts had overrun the world.
 Countries, even those who had been enemies for centuries, sounded a global alarm. Political differences were cast aside as humans scrambled to find a solution—any solution—to what became known as the Great Disaster 1.0.
 Human experimentations began, first in reluctance, then in earnest. As days turned into weeks and weeks into months, failure rates remained high. Desperate for results, global authorities started turning a blind eye to how experimental subjects were sourced.
 Countless victims were kidnapped and trafficked to state-run laboratories. Shi Tian was but one of them. But unlike those who died nameless, in pain, and unrecognizable, he had the fortune of surviving after being injected with humanity’s last hope—an integrated chip.
 Except… the chip remained dormant. It seemed that certain circumstances must be met before the chip could be activated. What those circumstances were, even the scientists in charge could not answer.
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 Having a rough life growing up, Wang Tong had numerous dreams of living a better life. However, his alcoholic foster father sells him off as a space settler of the distant planet Norton for some pocket change. Soon after his arrival, the Zergs overran the planet and obliterated its defenses in a matter of minutes. What awaited Tong on Norton was more than just an unbearable environment – its gravity alone was five-times stronger than earth – there were also swarms of bugs, constant hunger, thirst, and desolation.
 While he lives a year of total carnage and survival, humanity’s Confederation eventually overcomes the Zergs on Norton and the powerful survivor Wang Tong is given a recommendation to a once famous, but now dying military academy where he begins his life anew.
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<div class="content">
 The world of American comics, set sail again! 
 This time, it’s a story about Locke! 
 The name is Locke. 
 professional player! 
 The only player!
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Technological power starts with upgrading lenses

Chapter 3 Rubbing the lens by hand

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Technological power starts with upgrading lenses

Chapter 3 Rubbing the lens by hand

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