"Card science is a very profound science, but no matter how advanced it is, it also has an extremely simple beginning that is accepted by the world, as well as some bumpy processes in the middle.

In this process, more and more people who understand it will find it unfathomable, and gradually those with poor understanding and low qualifications will be eliminated, and those with high understanding and high qualifications may not really be able to reach the end.

To summarize in the words of a former sage, that is, "There is a road to the mountain of books, and there is no end to the hard work of learning the sea."

Cardology was not a science in the days of nations before the Federal Era.

The original first card, according to records, was not made by a powerful card maker, but was obtained from the first monster with extraordinary powers, SDW, which appeared on the Earth Star at that time.

SDW caused a great disaster to the earth star at that time, and the country was forced to use a nuclear bomb to destroy this monster, and after SDW's death, the card found in his body was an extremely rare golden six-star card.

This card was finally obtained by the great Title Card God White Emperor.

The White Emperor used this card to kill a lot of monsters that appeared later, which led to more cards being discovered.

There were some cards that were researched and investigated by the scientific research departments of various countries at the time, trying to reproduce the same new cards.

Since then, cardology has also been born with a vague outline.

After a long period of development, during this period, human beings began to come into contact with interstellar humans who entered the solar system and learned more advanced card-making techniques, which made more powerful card gods like the White Emperor begin to appear on Earth, and even some card-makers who created their own genres, which promoted the rapid development of card science.

However, although card science is developing rapidly, there are more and more monsters from the cosmic starry sky that invade the earth star.

Interstellar humans have no interest in the Earth Star, a barren region where the energy of heaven and earth is thin, so there are no strong people staying in the Earth Star to help clean up the interstellar monsters, and they do not leave those extremely top-notch cards beyond the seven stars.

Under pressure to survive, countries began to share card technology and huddle together for warmth.

The state system was abolished, the federal era was officially established, and cardology entered a golden age of rapid development......"

Tang Jian turned over the page of the book and continued to look down.

Almost most books on the basics of cards will explain the origin of cardology, the history of its development, and so on at the beginning of the book.

Tang Jian was already familiar with it.

He flipped through the pages and closed the book, turning his gaze to the other students in the class.

The third (12th) class of high school, this is just a very ordinary class, not an experimental class or a rocket class.

The best student in this class is named Wang Xue, who is a girl.

But her outstanding results are only in the arts and sciences, and she may be able to get into a good liberal arts college in the future.

But the mainstream of this world is cards, and the most noble social status is card masters or card makers.

No matter how good the results of arts and sciences are, once you can't become a card teacher, you can eventually climb to the top of an urban area at most, which is the limit.

In the card world, everything revolves around the card master.

Ordinary people can also want to engage in politics, but they are not card masters, they can climb to the township level at most, and it is impossible to go up, unless they become card masters.

If you want to do business, you can't go through the market if you don't have a card master, that is to say, what goods you want to sell, you can only obediently stay in an urban area and sell it.

If you want to go to the entertainment industry, you still have to become a card master.

In other words, a powerful card master is a big star in his own right, has a lot of popularity, and is followed and worshiped by many people wherever he goes.

It's not a card master, no matter how beautiful and good-looking you are, you can sing and dance, what kind of star do you want to be?

Dreaming.

Tang Jian was a three-star card maker and card maker in his previous life.

Therefore, he is well aware of the social status gap between card masters and ordinary people, and the most urgent thing to do when he returns from this rebirth is to become a card master again.

At present, in his class, Wang Xue, a student who has excellent grades in arts and sciences, but is not excellent at card making and card making, can be ignored.

And according to the impression in his memory, the best person in the class at that time was Liu Kun.

Tang Jian's gaze fell on a sturdy young man who was sitting in the front row of a group, grasping a grip device and squeezing it violently.

When this guy took the college entrance examination at that time, he scored a good score of 108 in the card test, which was more fierce than Yang Mao who knocked the medicine, but his card-making ability was very poor, and his cultural scores were average, and he was finally admitted to a school.

Now this guy should be above 70, and he will definitely be able to join the rocket class specially established by the school in ten days.

In addition to Liu Kun, there are several top students in the class who can be around 40, among which Yang Mao is one.

Tang Jian remembered that after the establishment of the rocket class, only Yang Mao and Liu Kun were in the entire class, and one named Gao Yang entered the rocket class.

"Hey, slut, why have you been in a daze for the past two days? Did I borrow your book yesterday and read it? Remember to return it to me after reading it. ”

At this moment, Yang Mao, who was on the side, bumped Tang Jian with his elbow.

Tang Jian came back to his senses, glanced at Yang Mao, and his gaze fell on a whiteboard card on his table.

Seeing that the complicated pattern was suddenly cut off in the middle of the way, he understood that Yang Mao should have failed to make a card, so he asked him to chat and relax.

"It's almost there, you can take it. Tang Jian casually took out Yang Mao's book and handed it to Yang Mao.

"So fast?" Yang Mao was a little surprised.

Tang Jian's eyes flashed and he suddenly thought, pointed to the whiteboard card on Yang Mao's table and said, "Your card has been invalidated, how about selling it to me cheaper?"

"Huh, do you want to collect a waste card?" Yang Mao looked strange, "The purchase price of a waste card outside is 10 yuan, if you want it, I will give you 8 yuan nearby." ”

It is indeed close, at least so as not to trouble running out to sell, but Tang Jian understands that this is a favor sent by Yang Mao to take care of him.

Yang Mao's family is not poor, so he naturally doesn't care about the lack of two yuan.

However, Tang Jian was not willing to take advantage of this buddy.

"9 yuan, sell me any waste cards you have in the future, so that you don't have to run around. Tang Kendao.

9 yuan to buy waste cards, and it is the kind with a large amount, he really didn't take advantage of Yang Mao, and it also saved Yang Mao from running out to sell, time is money.

Seeing this, Yang Mao didn't say much, and casually gave the waste card to Tang Jian, "You can take it, make up enough for a hundred and then give me money." ”

"Thank you. Tang Jian took the waste card, looked at it casually for a while, and stuffed it into the stationery box.

The function of the waste card is limited, and it can only be used to remake the card after washing off the energy ink with rare water, but it only has the last use value, and it is useless if it fails.

However, like this, the conductivity of the waste card washed with rare energy will be a little worse, which will eventually lead to an increase in the difficulty of card making, and the performance of the card produced may also decrease.

Therefore, although there is also a market for waste cards, people like Yang Mao generally sell them directly because they are troublesome.

However, Tang Jian has limited funds now, and he can buy a waste card from Yang Mao, and he can also save about ten yuan.

To make a whiteboard one-star energy card, the material cost of energy ink and whiteboard card is 45 yuan.

But with an acquired scrap card, and then remake a whiteboard one-star energy card, you only need to buy some more rare energy water.

The price of a bottle of rare energy water is 50 yuan, which can wash off the energy ink on about 10 cards.

In other words, buying a waste card to replace a new card can save about 11 yuan, which is Tang Jian's current daily meal money......