"Downside?"

When Wang Jian heard this, his face changed suddenly, and he immediately asked.

"Nineteen sons, what are the shortcomings of this compass?"

"The disadvantage is that if this thing encounters a magnet, if it encounters a place where there is a magnet buried underground, it will fail!"

Ying Changsheng explained.

Compass of this question.

It's unsolvable.

It can't be solved now, and it won't be solved in the future.

Hearing this, Wang Jian smiled and said.

"Nineteen sons, what kind of problem is this? In this world, how many places are there magnetic mines? ”

"yes!"

Ying Zheng nodded.

It makes sense.

"In my opinion, in the future, even if it is a tun commander in my army of Great Qin, everyone should have this compass, anyway, this thing doesn't look very valuable!"

"Father is wise!"

Win Changsheng complimented.

Compass?

This thing is really not very valuable, and it is really not a problem to have one per person......

……

Wu Shilu was a great merchant of Great Qin.

He would often go out of Daqin and then go to trade.

However, over the years, Wu Shilu has not personally gone outside the Saiwai to do business with the people on the grassland.

The reason is not that he doesn't love money anymore.

It's because.

Brother Zheng's restraint on it.

For these, businessmen who are relatively strong in strength, or local heroes, Brother Zheng has always been very jealous.

They are also very strictly guarded.

Therefore, after the Great Qin unified the world.

He was moved to live near Xianyang.

As for his business network?

Well, he's in charge of it.

And he is only responsible for remote command in Xianyang.

At this moment, Wu Shilu is no longer young.

He was at home, teaching his grandson the way of business.

Suddenly, I heard a servant from outside come to report.

Say yes, after the nineteenth prince is invited.

Wu Shi Lu heard this.

Don't dare to slack off in the slightest.

Because, on the land of the Great Qin Empire.

After all, it is the emphasis on agriculture and the suppression of business.

Business belongs to the end of the four industries.

It belongs to the lowly existence.

Although, Brother Zheng gave him the position of a king.

However, the feudal monarchs killed by the Great Qin Empire are not one or two.

Bai Qi is one, and Shang Yang is also one.

There is no shortage of him Wu Shi Luo.

In the eyes of those in power.

What is a businessman?

Merchants are just a bunch of fat pigs feeding.

If you want to kill it, you can kill it at any time.

Therefore, after receiving Ying Changsheng's order, Wu Shilu directly got into the carriage and hurried to the palace.

And at the same time.

In the Xianyang Palace.

Win Changsheng is instructing the craftsman in front of him.

According to what he said.

Make a compass.

This thing, it's not difficult to make.

Pretty simple.

It can be said that as long as you know the principle.

Yes, it was successfully made.

At this moment, after instructing the craftsman principle, the latter instantly understood, and then, in front of Ying Changsheng and Brother Zheng, he first skillfully made a wooden shell, and then, inside, installed the magnet.

Then, a compass was successfully made.

Above, there are also engraved words.

It is written in four directions: north, south, east and west.

Moreover, try it out, and the effect is not bad.

The only flaw is.

The surface of this compass.

It's empty!

There is no layer, glass protective cover.

It is easy to get into clutter without saying.

It is also susceptible to damage.

Looking at Ying Changsheng, he frowned vigorously.

But Brother Zheng, who couldn't put it down, asked the craftsman.

"Can this thing be made on a large scale?"

"Naturally, you can!"

The craftsman hurriedly replied.

"The production of this thing is nothing more than the consumption of some manpower, plus some magnets, this thing is worthless, Your Majesty can make tens of thousands of ...... on a large scale."

"Moreover, the villain thinks that this thing is really good, it can distinguish the south, south, west, and northwest, it is simply an artifact, I heard that the Yellow Emperor invented the compass car, but the villain has never seen that thing, and now His Majesty has this compass, this thing, the villain is really seen......"

"Yes, my son, the Yellow Emperor whose merits are comparable!"

When Ying Zheng heard this, he bowed his head slightly, and felt that what the craftsman said was quite reasonable and pleasing to him, he said.

"You make a compass, I will be rewarded, and you will be rewarded with two dollars!"

"Thank you, thank you, Your Majesty!"

The craftsman was overjoyed, and hurriedly kowtowed to Yingzheng and said.

You must know that Qin Banliang is very valuable.

Two pieces of money are enough for craftsmen to spend a long time.

At this time, Ying Changsheng looked at the shell of the compass and muttered.

"If only there was a glass cover, it would be fine!"

"Glass? What is it? ”

Ying Zheng looked at Ying Changsheng in surprise.

Well, Ying Zheng didn't know what glass was.

The reason is simple.

This thing hasn't been born yet.

In fact, until modern times, there has never been a glass production industry in Huaxia, and some are only similar to glass, colored glass.

However, the time when the glass appeared in China.

It's also relatively late.

Liuli appeared in the Kaiyuan period of the Tang Dynasty!

There is also a legend!

It was not until the Yuan Dynasty that it gradually emerged.

During the Ming and Qing dynasties, it was produced on a large scale.

Moreover, the glass thing, after the birth of Huaxia, is also quite valuable.

It belongs to the "rare variety" and is worth more than jade.

You don't see, inside Journey to the West.

Sha Seng is a rolling shutter general, what is the result?

smashed a glass lamp of the Jade Emperor, and was directly demoted.

It is conceivable that this thing is not something that ordinary people can use!

And for making glass, Ying Changsheng really doesn't know anything.

It's not that it's stupid.

Rather, it's because making glass is a highly specialized technology.

Moreover, the requirements for the temperature of the fire are also extremely high, and I really don't know how to do it for a while.

I saw it, Ying Changchang sighed, and said to Brother Zheng.

"A transparent jade, however, can be artificially refined......"

"Oh? That's good stuff! ”

Hearing this, Ying Zheng exclaimed.

"Transparent jade? Crystal clear? Isn't it crystal? ”

"Crystals?"

When Ying Changsheng heard this, his eyes lit up in an instant.

Yes, crystals can too!

However, it seems that although there are more crystals mined, the price does not seem to be cheap.

It's expensive!

Where did he get so many crystals?

Of course, Brother Zheng's words gave Ying Changsheng an inspiration.

Let him give birth.

The idea of making one thing.

Because, the crystal is used to make glass covers, which is indeed a bit of a waste.

However, if I make that thing with crystal.

That's not a waste at all!

On the contrary, it is just right......