"Oh, two brothers, Your Royal Highness, Master Zheng is here."

Cao Huachun's exaggerated voice, which could squeeze out sunflower oil, lit up when he stepped into the courtyard of the Wenhua Palace.

The backs of the camels of different heights in front of them immediately turned around.

The first to run forward and salute was the fifth prince Zhu Youzhen.

Half the size is when the body is growing, I haven't seen it for half a year, Zhu Youzhen's size has risen a lot, and his shoulders have become a little wider, but after all, he is only eleven years old, and he regards Zheng Haizhu as his mother's benefactor for revenge, so when he jumped over with three steps and two steps, his body actually revealed a childish spirit of a puppy.

Lu Xiangsheng paced over and said to Zheng Haizhu with a smile: "The students all know that the teacher is back today and is ready to hand in their homework. ”

Zheng Haizhu smiled and responded with interest, but his gaze quickly passed over Lu Xiangsheng and cast his eyes on Zhu Youxiao, the eldest son of the emperor behind him.

"Master Zheng......" Zhu Youxiao did the same as Sun Chengzong and Xu Guangqi, and neatly performed the student courtesy.

But where he stopped, he was not as close as his younger brothers Zhu Youzhen and Lu Xiangsheng to Zheng Haizhu.

It seems that even an extra foot or two of distance is a good way to relieve crampedness.

This distance allows the master and apprentice who have a mustard because of the expulsion of Ke Yinyue to complete a less awkward reunion in a sense of proportion.

In a short moment, Zheng Haizhu had already seen the small hammer in Zhu Youxiao's right hand, as well as a large stall of wooden shelves and iron nails at the foot of the camel not far away.

Obviously, that is what Lu Xiangsheng called "preparing for the assignment" - at the beginning, Zheng Haizhu instructed Wei Zhongxian to take the camel back to Beijing, so that the two brothers of the Zhu family could figure out the camel gun carriage that could be placed on the hump.

Zheng Haizhu suddenly felt that an emotion that could not be said whether it was joy or tenderness permeated her heart.

The seventeen-year-old young man in front of him, the heavenly aura of the imperial prince, like the cheers of the courtiers and the gossip of the common people, was isolated from the palace walls.

At this moment, in the eyes of the teachers who are standing at the end of the year, Zhu Youxiao's simple and beautiful temperament is exactly the same as those diligent civilian students in Songjiang, which is a kind of curiosity that focuses on learning from things, as well as the action of active creation.

Good boy, my good protégé......

Zheng Haizhu didn't have time to touch her mind clearly, as if she was licking a calf, and the warm light in her eyes flowed out naturally.

Zhu Youxiao was slightly stunned, and immediately, the strings in his brain seemed to be loosened.

The corners of his mouth and forearms were raised: "Master Zheng, look at the shelf that my fifth brother and I made." ”

Cao Huachun was also busy offering flattery: "Yes, yes, when I left the Qianqing Palace, Long Live Lord still praised my brothers, pondering this new French-style firearm is more interesting than pondering the crystal palace in the pool and the chiming bell in front of the platform." ”

Zheng Haizhu said gently: "As long as it is done authentically, it is all good craftsmanship." The two princes are so smart, they know what they learn and do what they do. ”

While speaking, several people had come to the camels again, and Lu Xiangsheng explained: "The two camels sent back by Madame, the gun carriage between the twin peaks, the prince and the ministers, made into the style of this heavy eaves roof, high in front and low in the back, two wooden beams on the left and right, should be stable." The trouble was dromedary ......"

Zhu Youxiao and Zhu Youjian stood on both sides of the dromedary camel, holding the embryonic gun carriage with four hands.

Zhu Youxiao took Lu Xiangsheng's words, and showed them to Zheng Haizhu on the one hand, and was embarrassed on the other: "Master Zheng, according to what you said, camels are not only used for pack horses, but also for gunners and gunners to sit on the backs of camels, handle firearms, and line up to meet the enemy. The Bactrian camel is fine, but with this dromedary, if the gun carriage is behind the hump, the rider has no place to sit. If there is room for the rider, how can the wooden frame be erected on the hump? ”

This question that makes the Zhu brothers nerve-wracking, Zheng Haizhu has actually been thinking about it.

For the camel cannon, the reason why she, a modern person who specializes in the history of the Ming and Qing dynasties, wanted to build it in the late Ming Dynasty was only because she remembered that when the Qing army conquered the Dzungar Department in history, she encountered the Dzungar camel artillery array, and the soldiers were lost.

But at the practical level, Zheng Haizhu didn't have any system to ask for the golden finger of how to solve the technical difficulties of the artillery mount from the Persians who were good at training camels.

It wasn't until he went to Chahanhot, the royal city of Lin Dan Khan, that Zheng Haizhu suddenly got inspiration.

"The Bactrian camel is big and good at cannons, but it runs slower, and it is much more expensive to ask the Hu people to buy it. We use camel formation, that is, we like that camels are cheaper than war horses, and the heavy muskets are not as heavy as turtledoves, and dromedaries can also resist, so we can't give up dromedary camels. ”

Zheng Haizhu said, waving at the two small firefighters who followed Cao Huachun to Wenhua Palace.

The little fireman hurriedly carried the burden, and after putting down the burden, he opened the large wooden box and carefully touched out several wooden objects of different sizes.

"What is this? Umbrella bones? Zhu Youxiao asked curiously.

"Your Highness, guess again, this is the thing for the Mongols to settle down." Zheng Haizhu picked up a piece of wood and inspired.

"Ah, I see," Zhu replied, "this is the roof of the dome." ”

Zheng Haizhu nodded and handed the wooden utensils to Zhu Youxiao: "Yes, it is the dome where the Mongolians live, and our border army of the Ming Dynasty is called a yurt." However, those Mongols who were marching or grazing were very rudimentary, and the yurts I saw in the royal city of Chahar this time were not only gorgeous and luxurious, but also ingenious in the wooden beam structure of the dome. At that time, I thought, isn't the hump the same as this yurt, in the shape of a nest head? Therefore, whether it is entering the tent of Lin Dan Khan, or the Yalu of his Fujin, I have written down the wooden beam structure of the dome, and on the way back to the south, let the soldiers under General Ma who know a little carpentry make these models very similarly, I don't know if it will inspire you. ”

The more Zhu Youxiao listened, the more sparkling his eyes appeared.

This future prince, who has a talent in carpentry, is like a grandfather appreciating food, rubbing the "yurt" that has shrunk a hundred times, and suddenly brightened.

"With tenons," Zhu You told the crowd, "use tenons to connect into wooden rings, and tie these umbrella bones to cover the hump." A harpoon-like mechanism was set up on the top to hold the big guns in Master Zheng's firearms factory. ”

The Zhu brothers learned the knowledge of firearms attacks from Lu Xiangsheng, not only read the firearms books of their predecessors, but also knew what the various firearms produced by the Songjiang Firearms Factory looked like, and they were also familiar with the fulcrum of heavy arquebuses.

"Okay, try it," Zheng Haizhu showed a happy expression, turned his head sideways to Lu Xiangsheng and said, "Han Changli is not deceiving, he has been a disciple and a teacher in the past generations." ”

Lu Xiangsheng is a person with a clear mind, and regards Zheng Haizhu as the eldest sister, since she entered the Wenhua Hall today, Lu Xiangsheng has been listening attentively, and immediately said at this moment: "So you see, Master Zheng is right, only physics can lead to conscience." The wooden utensils of the pavilions, doves, cars and boats before the two princes were not made in vain, which one of them did not use tenons? ”

Zhu Youxiao listened sweetly, and for a while he only felt that Master Zheng and Master Lu were really the best teachers in the world.

"That's right," I only heard Zheng Haizhu think of something again, and said to Lu Xiangsheng, "Tomorrow, you go with me to Honglu Temple, Lin Dan Khan has a tent car as a national gift, and he will stop at Honglu Temple." There are some components of the tent car, which seem to be involved in the study of one or two, but can be changed to a gun carriage to fold, you go and take a look, see it, and tell the two princes in detail. ”