Li Ke's eyes were deep, no one else would know about this matter, but in fact, whether others knew it or not, Li Ke didn't care.

Not to mention other people, even if Liu Zhao and them knew, Li Ke didn't care, they couldn't blame Li Ke for passing the news to Yuangai Suwen, and they had to say thank you to Li Ke.

Because it was never Li Ke who made the choice, but Yuan Gai Suwen.

If this news is not known to Yuan Gai Suwen in advance, after Liu Zhao and these people go back, not to mention their family members and friends, and none of them will survive.

What Li Ke did was nothing more than to adjust the order, and he also saved the lives of Liu Zhao and them. As for how they choose, what do they want to do, what does that have to do with Li Ke?

He, Li Ke, just opened his mouth to say something, and how they chose was not what Li Ke forced them to choose.

Besides, maybe Li Ke thought too much, and Yuan Gai Suwen wouldn't do this.

After staying away from Chang'an City, Zhang Xi directly threw a few steppe man-style money bags in his hand to Liu Zhao, and said viciously: "Hurry up, if we see you near Chang'an City again, Your Highness won't let us do it, and we will have to kill you secretly!" Hum! ”

After speaking, Zhang Xi directly turned around and left with people.

"Boss, this His Royal Highness the King of Qin, did you really let us go?" One of Liu Zhao's subordinates couldn't help but ask.

"If you want to kill us, do you need that?" Liu Zhao smiled bitterly, the other party's atmosphere was far beyond their imagination, and Liu Zhao's heart was already confused.

In addition to being confused, there is endless panic, he is very conflicted in his heart now, he is afraid that Li Ke is right, it means his family and ...... Liu Zhao didn't dare to think about it anymore. But if Li Ke guessed wrong, then Liu Zhao didn't know how to deal with himself.

Do you want to hand over these things to General Yuangai Suvin?

But with his understanding of Yuangai Suwen, this thing is really going to be handed over to the other party, waiting for the fate of these people......

"Boss, what are we going to do?" The other subordinate was also a little dazed, or rather, all of them were a little dazed.

"I don't know, but let's go back, after all, Goguryeo is our home." Liu Zhao paused for a moment before speaking softly.

"Boss...... I'm scared. One of his men was silent for a long time, then spoke.

What he fears, everyone knows.

"Don't be afraid! I don't know what you think in your hearts when we go back, but if something does happen after we go back, you can make your own choice. Liu Zhao took a deep breath and then spoke.

After speaking, he took out the book in his hand, "The content of this is what His Royal Highness the King of Qin told us, if you want to listen to it, I can read it to you on the way, and you can discuss it with each other, and when you get to the border, I'm afraid you won't be able to take out this book." ”

"No matter what the situation is in our family, if this thing is seen by the general, we will die."

"So, if you want to learn something, just memorize it."

The others didn't speak, but Liu Zhao seemed to know their thoughts, but first opened the money bag and looked at the money inside, and then said: "Let's go, go to the next county, the other party gives a lot of money, go to the next county to buy some pack horses." ”

The pack horse is not expensive, the other party gave them a lot of money, and there were some silver taels in it, to be honest, Liu Zhao didn't know why His Royal Highness King Qin would do this, could he really expect them to help him work?

It's just that there are some things that he didn't dare to think about before returning to Goguryeo, and he didn't want to think about them.

People often feel that "life is limited", but they live like "life is infinite".

There are a few hundred years in life, thinking of the beautiful scenery of the good day, and resting and letting go.

At the beginning of February, after receiving an eight-hundred-mile rush from His Royal Highness King Qin, Yu Wenlin packed up the relevant materials and rushed to Chang'an as soon as possible, hurrying slowly, because Weihe and others had not yet thawed, so it took more than half a month to rush to Chang'an.

When he arrived in Chang'an, Yu Wenlin came to see Li Ke secretly as soon as possible, but this time it was not only Li Ke who saw Yu Wenlin in the Liangyi Palace, but also Li Shimin and Li Chengqian.

"Chen Yu Wenlin has seen His Majesty, His Royal Highness the Crown Prince, and His Royal Highness the King of Qin." Yu Wenlin's mood was stable, if it was two years ago, he might have been very excited to see Li Shimin.

But now, he is no longer excited, or rather, Li Ke has opened his eyes and made him understand what the real world is, so he is not excited to see anyone except His Royal Highness King Qin now, and when he sees His Royal Highness King Qin, it must be His Royal Highness King Qin who has more advanced knowledge.

"No courtesy, your Yuwen clan has been prone to craftsmen since ancient times, for example, the people who built this Chang'an City are also the people of your Yuwen family." Li Shimin said with a smile.

"Thank you, Your Majesty, if it weren't for His Royal Highness the King of Qin, craftsmen like us wouldn't be able to get on the stage." Yu Wenlin said with a calm face.

Li Shimin: "......" If it weren't for Li Ke's fancy to him, Li Shimin would be angry, would you chat?

"Okay, no more nonsense, how did you build the ship I asked you to make?" Li Ke asked.

"Your Highness, if you provide the drawings and we can't build the physical object, then we are a bunch of pure waste, and you can just drive us away." Yu Wenlin said very simply.

Okay, since chatting with Li Ke is like this, Li Shimin is not angry.

"Is the ship finished now?" Li Ke nodded seriously and asked.

"Yes! We built two sharp-bottomed modified sailing ships with a displacement of about 1,200 tons, a deadweight of about 700 tons, and a full load displacement of 1,900 tons. With a 10% risk reserve, the cargo load is about 600 tons. Yu Wenlin directly gave a number.

"Tons?" Li Shimin raised his eyebrows.

"A ton is about sixteen stones." Li Ke gave Li Shimin an approximate number. For example, Yu Wenlin and these people have already used the standard unit of measurement that Li Ke called, mainly because the stone and other units of measurement in Datang are often inaccurate, and it is difficult to convert, Li Ke simply uses tons.

Of course, this ton is not used casually, he found several sets of standard weights in the warehouse in his mind, and Li Ke took out a set of prototypes for them to make accurate measurements. Of course, this thing can't be completely accurate, but Li Ke can only do it this way.

At present, Datang's scientific research does not need to be so accurate, and in later generations, the standard weight of one kilogram is calculated by Planck's constant, of course, in this world, who will name this constant in the end, then Li Ke does not know, he will definitely not live to that point.

In later generations, for more advanced scientific research, standard weights were calculated together with the speed of light and atomic seconds, and many modern weights and measures were interchangeable. Planck's constant h = 6.62607015 ×10−34kg m2S−1

1KG=h/6.62607015X10-34 m-2S。

where meters and seconds are defined by the speed of light C and the 133 atomic resonance frequency ΔνCS of the cesium atom, respectively.

The speed of light C = 299792458 m S-1, so 1m = 1/ 299792458 C·S;

CESIUM133 ATOMIC RESONANCE FREQUENCY ΔΝCS = 9192631770 HZ, i.e. 1S = 9192631770 / ΔνCS ;

Bring in the above formula and you can calculate it.