"The theory is feasible, but it has not been successfully studied yet, the explosion rate is too high, and this time you are invited to calculate the ballistics of the ballista, which is the same as the calculation method of the artillery, but the initial velocity is slower. Pen, Fun, Pavilion www.biquge.info," Wang Mai replied.

Li Er looked at the manuscript paper in his hand, felt that his head was big, and hurriedly turned his head to look at Li Chunfeng: "Can the landing point of the cannonball really be accurately calculated?" He still couldn't believe that there were people in the world who could be so good at arithmetic, and even calculated the trajectory of the cannonball's flight so clearly, it was unbelievable to say.

Li Chunfeng smiled confidently: "This is just a trivial matter, but there will definitely be a deviation between theory and practice, this deviation is not a problem of the calculation itself, but depends on air resistance, as well as terrain and other factors, these factors must be calculated in practice." ”

After listening to Li Chunfeng's words, Li Er was even more dizzy, a trajectory calculation is complicated enough, and there are so many interference factors, but looking at Li Chunfeng and Wang Mai in front of him with sworn expressions, there should be no problem with this matter.

"The artillery battalion recruits all scholars with a foundation in arithmetic, and they have been taught for a period of time in February, so it is estimated that it is not difficult to master calculations, and now only Li Chunfeng needs to establish a mathematical model." Wang Mai said.

Li Er didn't ask what a mathematical model was, anyway, the more he listened, the more confused he became, as long as these two people said that there was no problem. Suddenly remembered another thing, hesitated for a long time, but lowered his voice and asked, "I heard that Mr. Li speculated that there will be a tengu eating the moon on the first day of the next month?" ”

Tengu eats the moon? Dugu Yitan behind the screen was surprised for a while, and wanted to hear the content of the conversation between the three of them, but the three of them deliberately lowered their voices, and couldn't hear the content of the words clearly, so they subconsciously stretched their heads forward, not wanting to touch a hard object under their feet.

The sound of a "bang......" was very slight, but it was like thunder in the open space.

"Who!" Li Er's guards drew their swords out of their sheaths one after another, staring at the bottom of the screen, where an embroidered shoe had just been withdrawn.

The three people who were talking were shocked, could it be that someone was eavesdropping? Li Erteng stood up: "Don't let the thieves escape!" ”

The wind-like group of guards surrounded the people behind the screen, but the scene in front of them made people stunned, but they didn't expect that this person who dared to eavesdrop on King Qin's words turned out to be a delicate little lady.

Li Er also walked over at this time, and was stunned when he saw the person in front of him: "Yi Tan? ”

Dugu Yitan waved his hand to Li Er awkwardly: "Cousin! ”

At this time, Dugu on the first floor saw that his sister had not come down for a long time, and his heart became more and more anxious, afraid that his sister was really sick, so he hurriedly stood up and walked to the bar to ask about his sister's situation.

"Are you talking about the little lady?" The maid's face changed, "She hasn't come down yet?" ”

"Where did she go?" Dugu Xiude saw the change in the other party's face, and his heart became even more anxious.

"Second floor!" The maid said subconsciously.

Dugu Xiude was about to go upstairs when he heard this, but he was dragged by the maid: "Slow, you can't go up!" ”

"My sister is sick, who can be responsible if something goes wrong?" Dugu Xiude didn't care about this being Wang Mai's territory at this time, and immediately showed his true colors.

"I'll take care of it!" A voice came from the stairs, "Brother Dugu, don't you come to harm?" ”

"Brother Wang...... Engong! Dugu Xiude saw Wang Mai and hurriedly stepped forward and saluted.

"Brother Dugu doesn't have to worry, Sister Ling is upstairs."

Hearing Wang Mai's answer, Dugu Xiude finally breathed a sigh of relief: "My sister is young and ignorant, and I hope that Engong will not blame her." Seeing that the victim came forward, Dugu Xiude knew that his sister must have disturbed Wang Mai's distinguished guest, and he was ashamed.

"King Qin asked Brother Dugu to go upstairs for a while." Wang Mai said.

"King Qin is upstairs?" Dugu Xiude was surprised when he heard this, no wonder Wang Mai said that he would accompany King Qin, it turned out that the two met here. I had long heard people in the family say that Wang Mai was a member of King Qin's faction, and reminded him not to get too close to Wang Mai.

As a relative of the emperor, the Dugu family knows the truth of self-preservation, and never participates in this kind of struggle for the heirs that is related to the survival of the family, anyway, neither side can treat them badly if they win. On the other hand, although there are still dozens of officials in the Dugu family in the court, there are no high-ranking officials in the real power core, at most they are local assassins and long histories.

At this time, compared with the previous period of the Han Dynasty and the Three Kingdoms, the area of the state was dozens of times different, and in fact, the scope of jurisdiction was only a few counties, at most a dozen counties, which was equivalent to the prefecture-level cities in later generations. Therefore, although the Dugu family has a high status, in fact, the real power is very small, and it is not at all the same as the behemoth of the five surnames and seven wangs, which may be due to the lack of political initiative within the family due to the long-term rich life.

However, this cannot be blamed on the Dugu family, the Northern Dynasty has changed its regime several times in the past hundred years, and the usurpers are all powerful people in the current dynasty. This is a very big warning to those in power, on the one hand, to be kind to these relatives who have worked hard for their superiors, and on the other hand, to find ways to limit their development, so as not to lose their tail.

Li Er also heard the news that Dugu Xiude was about to be released as an official, and said a few words of encouragement to this distant cousin, Li Er's face sank: "Yitan is a woman, as a brother, why don't you discipline her strictly, but let her run around, in case something goes wrong, what should I do?" ”

"Your Highness is taught!" Dugu Xiude secretly said in his heart that it was not good, it must be that his sister heard something that should not be heard, this troublemaker really made it difficult for his brother.

Li Er glanced at Dugu Yitan who was standing next to him with his head down, snorted coldly, and went downstairs with his guards.

"Brother Dugu......" Wang Mai patted Dugu Xiude on the shoulder, "Please also talk to Sister Ling after you go back, and ask her not to divulge today's affairs, so as not to get into trouble." ”

"Eun Gong, please rest assured!" Dugu Xiude wiped the sweat on his face and said. Although Li Er is a few years younger than him, the pressure on people who have been in the top position for a long time is not ordinary.

Watching Wang Mai and Li Chunfeng go downstairs, Dugu Yitan let out a long breath: "My cousin is so fierce, he scared me to death." ”

"You still say!" Dugu Xiude was really a little annoyed this time, "If you hadn't broken into here without knowing the sky, how could my brother have suffered this lesson for no reason." ”

"Who knew they were talking about these ......," Dugu Yitan said aggrievedly.

"That's it! Forget everything you just heard, and don't say a word to outsiders! Dugu Xiude threatened viciously.