They studied this QR code for a long time, but they didn't understand what it was.

Eventually, they gave up on their research on QR codes.

Li An said thoughtfully: "The rut of the car ahead, the lesson of the car behind, we must do a good job of anti-counterfeiting marks." ”

Their family, in the gambling activities of His Royal Highness King Liang, once thought of using the fake to confuse the real and bring down the King of Liang, and now he has been renamed the King of Shu.

So, when they're doing it, they have to block that.

However, among their families, there are skilled craftsmen, and it is definitely not a problem to design some complex patterns.

I believe that in a short period of time, no one will be able to crack it at all.

At this time, Wang Qi couldn't help but say: "We can print 10 million lottery tickets first and try the heat." It's just that for the setting of the grand prize, I don't know what suggestions everyone has? ”

The jackpot must be set, and without the jackpot, it will certainly not attract so many people to buy lottery tickets.

But if the jackpot is set up, they will earn a lot less.

As a result, Lu Yong smiled and said: "I think that we will also set up three first prizes, ten second prizes, fifty third prizes, and one hundred fourth prizes just like the King of Shu." There are 300 fifth-class prizes and 1,000 sixth-prize prizes. ”

"However, this second and third prize, let's take it out separately and don't put it in the lottery box. When the time comes, our people will hold these awards for the lottery. ”

This Lu Yong is even more ruthless, not only the first and second prizes, but also the third prize is not ready to be taken out.

However, this is also in line with the image of the family that eats people and does not spit out bones.

……

On this day, when Li Su was resting at home, Yan Liben came to look for Li Su.

This time, Yan Li didn't just come to return the textbook, he also brought a drawing.

This drawing is the layout of a new city that he designed himself.

"Master, this is the apprentice's design drawing, please advise the master."

After such a long period of study, Yan Liben has learned to draw drawings with three-dimensional graphics.

After Li Su opened it, he found that this design was very beautiful.

There are even a lot of modern urban design ideas inside.

Well, there are a lot of modern concepts in the textbooks he originally studied.

Seeing Yan Liben's design drawing, Li Su was still quite satisfied.

However, Yan Liben still has historical limitations after all!

For example, how can a city be without parks?

There must be a place for leisure and entertainment!

Also, the road is too narrow and must be widened.

Others, a few, but not as good as they could be.

And when Li Su pointed out his shortcomings, Yan Liben couldn't help but nod thoughtfully.

At the same time, Yan Liben's admiration for Li Su is even greater.

The master is not a master, this design drawing, but it took me a long time to design it, and I think it is foolproof.

But the master just took a few casual glances, picked out so many faults, and gave so many pertinent suggestions.

At that moment, Yan Liben immediately revised it in the study.

At this time, Li Chunfeng, another apprentice of Li Su, and Wang Xiaotong, a former arithmetic teacher, came together.

These two people have become good friends in this short period of time because of their new arithmetic.

Li Chunfeng is very talented, and his progress in physical chemistry is very rapid.

But in arithmetic, it is more than a step worse than Wang Xiaotong.

This made Li Chunfeng admire Wang Xiaotong very much.

As everyone knows, Wang Xiaotong admires Li Chunfeng even more.

Because although Li Chunfeng is slightly inferior to himself in arithmetic, in other aspects, he is far away from himself several streets.

In Li Chunfeng, Wang Xiaotong saw the possibility of new arithmetic in practical application.

Therefore, in just one road of kung fu, Li Chunfeng and Wang Xiaotong became confidants.

After coming to Li Su, Li Chunfeng asked Li Su a question: "Master, I don't know when you showed us the small plane, how can we make it?" ”

Plane?

Seeing the puzzled eyes of Wang Xiaotong and Yan Liben, Li Su had to take out the model plane from the room again and let the plane fly around the sky.

After the plane landed, Yan Liben and Wang Xiaotong were already shocked beyond measure.

Uh, well, most of the people who saw it for the first time had this expression.

Now, even Yan Liben and Wang Xiaotong are deeply attracted.

You must know that Yan Li was originally a master architect, but at the same time, he was proficient in production, and his talent was not limited to architecture.

Seeing the expressions of the three of them, Li Su suddenly had an idea and said, "Have you seen it?" When science is developed to the extreme, it will be able to create things that can only be imagined in dreams. How big the heart is, how big the stage is. ”

"Like an airplane, it involves physics, chemistry, mathematics, materials science, mechanics and other scientific knowledge, which cannot be made in a short period of time. Of course, as long as you study diligently and accumulate over time, you will be able to make a real airplane sooner or later. ”

Li Chunfeng asked reluctantly: "Master, can I make that kind of small plane now?!" ”

Hearing Li Chunfeng's words, Li Su couldn't help but have black lines on his head.

Do you think this little plane is so easy to make?

The scientific and technological content in this is not small at all.

Don't look at the price of toy airplanes in later generations, but the scientific and technological content in them is not a lot at all.

Want to make a toy airplane in Datang?

It's just too difficult.

However, Li Su was unwilling to discourage Li Chunfeng's enthusiasm.

Suddenly, Li Su thought of a way, and couldn't help but say to Li Chunfeng: "Chunfeng, you have to eat the rice one bite at a time, and the road has to go step by step!" So, before making an airplane, you first study the problem of train tracks. ”

Train tracks?

Li Chunfeng couldn't help but ask curiously, "Master, what is a train track?" ”

Li Su explained with a smile: "The train track is actually a kind of steam locomotive, which can pull tens of millions of catties of goods and fly automatically. However, because it is too heavy, the ordinary road surface does not allow it to walk at all. ”

"Therefore, the rail can only be laid and let it run on the rail. Can you imagine what type of rail would be needed if you needed to lay this rail? What does his force point look like? How should it be laid? ”

After saying that, Li Su was afraid that they would not understand, and even drew a model of a train and steel rails.

And Li Chunfeng, Wang Xiaotong and Yan Liben, after seeing the model drawn by Li Su's pen, couldn't help but be shocked to the point of no return.

The three of them instinctively felt that since the prince had drawn a model, it proved that this kind of steam locomotive must be able to be truly manufactured.