After seeing the envelope sent back by Li Jing, Li Shimin's face had some expressions of crying and laughing.

"This should be a coincidence."

Li Shimin muttered softly, Li Jing originally wrote on the envelope some of the layouts about Annan, and finally recommended Wang Xuance to be in charge of Annan in the future.

At least half of the letter is praising Wang Xuance, and the remaining half is also foreshadowing.

It can be said that Li Jing is very optimistic about Wang Xuance, if it weren't for Shu An's disciples, then maybe he would have started.

Of course, Li Jing analyzed it according to the actual situation of Annan, and taking Annan naturally does not mean that Annan will become the granary of Datang.

About this, this emperor naturally won't understand, and he wanted Wang Xuance to go to Annan because he was familiar with it.

In addition, Annan is a long way away, and it has always been a bitter cold place in the eyes of everyone, so naturally not many people want to go there.

Wang Xuance is the best choice, he can be civil and martial, and it is the best choice to govern Annan.

Now it is another reason, because Wang Xuance has already conquered Li Jing in Annan.

You must know that Li Jing has never recommended a person like this, of course, Li Li Shimin can see from the envelope that Li Jing is not because of any emotional factors.

Instead, I really hope that Wang Xuance will be in charge of Annan, especially when this letter is still not taken by Annan.

From this, it can be said that Li Jing is the candidate for Wang Xuance, but this matter is not so easy to handle.

The reason is very simple, Wang Xuance's qualifications are still too shallow, even if it is a bitter cold land, but after all, he is still in charge of a territory.

It is equivalent to the history of Daozhou's assassination, which can be said to be a feudal official, and Wang Xuance obviously does not have this qualification.

"It's something that needs to be planned."

Li Shimin couldn't help but shake his head and said loudly, although he agreed in his heart, it was not easy to actually do it.

Chang'an Suburban Academy

After more than a month, Shu An also came to the academy, where a vacant land opened up next to the academy has become the place where this carpenter lives.

Although it is only temporary, as the saying goes, there must be a brave man under the heavy reward, although some carpenters did not understand the crossbow machine.

However, they are willing to learn, and some people have already tried to make some crossbow machines, although only some of them are similar, but it can be said that they have made rapid progress.

And this also made Lu Mu, the person who took the lead, have a sense of crisis and dare not relax at all.

"Master, this is the crossbow machine made by the villain."

Lu Mu saw Shu An's eyes lit up, and he trotted all the way and said respectfully.

Compared with the short carpenter who was only willing to make promises, Lu Mu has changed a lot now.

The main reason is that Shu An made him the captain of the squad before, and his subordinates were in charge of some people, so he was naturally a lot more confident.

As for the other carpenters, they hadn't seen Shu An, but seeing Lu Mu's appearance, they naturally knew that this old man must be a big man.

"Well, let someone show you first."

After Shu An said softly, his eyes fell on the crossbow machine not far away.

Because he had read a lot of information before, he was not unfamiliar with crossbow machines.

At the same time, Shu Mad Tiger asked one of the two guards to demonstrate.

"Shuttle!"

A scraping sound pierced the air, followed by an arrow hurtling towards the trees in the distance.

"Ding!"

When the arrow landed on the tree, Lu Mu on the side couldn't help but secretly watch the expression of this old man.

To know that this crossbow machine is also his initial attempt, after all, he was limited by conditions before, and he didn't have so many materials.

It's a pity that Shu An's face was expressionless, which made this Lu Mu feel uneasy in his heart.

"It's hard at the beginning, but I don't know that I can improve it, so that the crossbow machine has a longer range and is more powerful."

Shu An's eyes flashed and he said, if the crossbow machine is now, it will definitely not meet the requirements of bringing explosives.

After all, explosives weigh a lot, but it's a good start.

It's just that Shu An's words made the carpenters present show a look of embarrassment on their faces.

It seems that this thing is very difficult, and it is really not too difficult for them to make a crossbow machine according to the drawings.

But if you want to modify it yourself, then 99% of these carpenters don't have this kind of talent.

Even Lu Mu, who was full of confidence before, didn't dare to speak at this time, because it was not so simple to improve.

And Shu An, who saw this scene, shook his head, this era basically doesn't think that he can surpass his predecessors.

So this also caused the slow progress of Chinese history, but he couldn't ask so many of these people.

After all, their thinking is also related to their own growth environment, and this matter is really too difficult for them.

But fortunately, Shu An had already prepared, and the information for this period of time was still not in vain, and he still found something from his memory.

The name of such a thing is called the bed crossbow, which only appeared during the Song Dynasty, although it is a lot more bulky, but Shu An does not care.

"This is the drawing I designed in the past few days, you can take it and study it first."

Shu An's eyes flickered and he continued to speak, there was not much emotion in his words, but no one present dared to underestimate it.

Shu'an didn't stay long here, the ballista was only one part of it, and gunpowder was just as important.

And finally the coordination between gunpowder and ballista, etc., which take a lot of time to run.

And after Shu An left, Lu Mu and the others finally opened the drawings brought by Shu An.

In fact, although Lu Mu and the others are respectful on the surface, they still inevitably despise them in their hearts.

There were so many carpenters they couldn't make improvements, let alone this old man who didn't seem to understand carpenters.

"There seems to be a lot of feasibility in this drawing design."

"Yes, although I don't know how effective it is, it may be more powerful."

"The master is really a genius of the heavens, maybe this crossbow can really be made."

......

However, after reading the drawings, a voice of discussion sounded, and there was a trace of shock in the words.

As carpenters, they could naturally see that the bed crossbow evolved from the crossbow machine, and more importantly, the design was more elaborate.

Many carpenters also had a hot look on their faces, because their previous performance seemed to disappoint this old man.

Especially Lu Mu, there is a lot of shame on his face now, how can he say that he is also the little leader of these carpenters, and he is the first to bow his head and admit defeat.

"The master has an order, take the lead in making a bed crossbow and reward ten times."

At this moment, one of the guards stood up with a smile and said, obviously familiar with these people.

The same trick was used to make the crossbow machine before, and it seems to work well, but this time it is still the same.