Liu Bei's army camp, now Liu Bei's Chinese army has reached the halfway point, and the front army will be able to reach Nanzheng in about two or three days.

"My lord, why did Bo Yuan write at this time? But his whereabouts were exposed? Pang Tong came in, and when he saw Liu Bei frowning, he couldn't help asking.

"It's exposed~" Liu Bei sighed, handed the letterhead to Pang Tong and said: "Wen Chang has captured Chuyang half a month ago, and successfully attracted the main force of Hanzhong, but unfortunately we couldn't arrive in time, Bo Yuan in order to save Wen Chang, with 500 people fraudulently claimed 5,000 people, and Zhang Lu, who was forced by the banner of Yun Chang, had to withdraw his troops, but in this way, it was difficult for us to break through Hanzhong." ”

"If the main force of Hanzhong comes back to help, it will soon be able to find out the truth of Boyuan, and the front army can be ordered to speed up the march and join Boyuan first." Pang Tong had a toothache, he remembered that the road was not easy to walk, he arrived ten days earlier than expected, why did Wei Yan run so fast?

Liu Bei nodded, Wei Yan's intention to attack the east and west was a failure, and now Liu Yi's camp can't be lost, otherwise Liu Yi's side will retreat, and Zhang Lu will take advantage of the situation to come over The road here will be cut off, then they will run in vain.

When Pang Tong saw the end, he suddenly smiled and said, "Lord, Bo Yuan, please ask that Zhang Lu for some soldiers, horses, grain and grass." ”

"30,000 soldiers and horses, how can Ji Yu be willing to give it?" When Liu Yi heard this, he also shook his head with a wry smile and said, since he entered Shuzhong, Liu Bei has successively obtained more than 10,000 soldiers and horses from Liu Zhang.

"That is, he will not give it." Pang Tong said with a smile: "Otherwise, when our army defeats Hanzhong, what reason is there to attack that Liu Zhang?" We waited for him to fight in the bloody battlefield of Yizhou, but Liu Zhang detained our army's grain and grass in the rear for various reasons, so that General Wei almost lost his life to the enemy, are these reasons enough? ”

Liu Bei didn't think about this aspect at first, but now that Pang is unified, he also understands that Liu Yi is not joking, but really lets himself ask for it, and he is not prepared for Liu Zhang to give it, in order to have an excuse to send troops to Yizhou.

I forgot about it.

But Liu Bei didn't answer, this kind of thing is still not compatible with his image after all, he is going to write to Liu Zhang for a while, first ask for 50,000 people, 100,000 stones, grain and grass and money, and then give a million, Liu Yi told him before that he wanted the road from Shuzhong to Hanzhong, and he would start work after pacifying Hanzhong, before he was still thinking about it, and now Liu Bei is not thinking about it, after all, Hanzhong will be his own territory in the future, and the road dredging will only be good for Liu Bei.

Think about what else could you ask for?

"My lord?" Seeing Liu Bei pondering there, Pang Tong couldn't help but shake his hand in front of his eyes.

"What else is the matter with Shiyuan?" Liu Bei came back to his senses, subconsciously wiped the corners of his mouth, and asked.

"I also want to discuss with the lord about attacking Nanzheng." Pang Tong said with a smile.

……

Since Zhang Lu did not choose to surrender or retreat, Liu Yi should prepare for the next siege battle.

With a few craftsmen, Liu Yi began to calculate the defense of Nanzheng City from afar, Huang Zhong and Guan Ping, who were responsible for protecting Liu Yi, only saw Liu Yi holding a tripod, measuring something, and after a while, he reported a set of data, and then asked the craftsmen around him to record, Liu Yi reported the numbers, but on the paper, the craftsmen did write a lot of 123456 symbols, which made people dizzy.

Guan Ping looked at the tripod in Liu Yi's hand with some curiosity and asked, "Sir, what is this?" ”

"It is used to measure the height of the city." Liu Yi replied simply.

"This thing can be measured?" Guan Ping didn't believe it.

"Yes, you can know the distance from the city, but now you can only have an approximate estimate." Liu Yi said with a smile, in fact, it is a geometric problem of a right-angled triangle that knows one side and the angle and then finds the other right-angled side, which is not very profound, but it is really difficult for people who do not study mathematics to understand, Liu Yi is a general concept, it is best to understand, and it will be used in the future, if he doesn't understand, he will not teach it, and when he publishes a book in the future, he will buy it and read it.

"But sir, the people on the walls seem to be watching us." Guan Ping glanced at the Hanzhong soldiers on the city wall who were watching closely here, if the other party sent troops out at this time, it would be very embarrassing.

"It's okay, it's time to lower the drawbridge and open the city gates, we ran early." Liu Yi smiled indifferently, then looked at these craftsmen and said, "The data has been remembered?" ”

"I've got it in mind." Several craftsmen nodded their heads.

"Okay, change sides!" Liu Yi turned over and said to Guan Ping and Huang Zhong: "Let's go to Ximen." ”

Huang Zhong and Guan Ping were a little speechless, even if they didn't fight for the time being, but they just ran to the bottom of the city to calculate the data, is it really good?

On the city wall, Yang Ren, who had already returned, frowned and looked at the group: "What are they doing?" ”

Several generals shook their heads, God knows.

"Keep an eye on them, get a few close to the walls, and shoot them immediately!" Yang Ren always felt that there was something wrong with these people, but he didn't know what they were doing, so he could only order the soldiers to be vigilant.

It took more than an hour, Liu Yi ran around Nanzheng, collected the data he needed, and the next thing was to build a sand table, design engineering equipment, and the soldiers were constantly cutting wood for backup.

"The height of the city wall of Nanzheng is basically between five zhang two and five zhang four, and the effective range of our army's catapult is two hundred steps, and the height is ...... in the conventional calculation," Liu Yi said while composing, catapults, wells, and ladders are the main siege weapons after the war, and Liu Yi has made varying degrees of improvement.

The siege equipment of this era basically has room for improvement, especially the catapult, the existing catapult has not selected the best point in the problem of the power arm, and the range is naturally close, not considering the attribute bonus, just the change of the force arm, the new catapult designed by Liu Yi is much stronger than the previous one, not to mention the attribute bonus, on the battlefield of this era, it is definitely the enemy's nightmare!

"Follow this drawing!" Liu Yi summoned the craftsmen and handed them the new catapults and ladders he had designed, and asked them to do it themselves.

"Sir, this catapult is no different from before." Guan Ping had been watching from his side, and after seeing the craftsman leave, he couldn't help but be curious.

"The change of the power arm is enough to exert a stronger effect." Liu Yi said with a smile.

"What?" Guan Ping looked at Liu Yi blankly.

"I'll just make you two models." Liu Yi had no choice but to find some waste wood, and the carving knife naturally slipped out of his sleeve to carve these waste wood.

Watching the parts take shape quickly in Liu Yi's hands, even if he had seen it many times before, every time he saw it, it still made Guan Ping feel a dazzling feeling.

In a few moments, the two catapult models were ready.

"This ......" Guan Ping looked at Liu Yi with some confusion: "What's the difference?" ”

Except that the wooden pole on which the catapult throws stones seems to be somewhat different, there is no difference at all in other aspects.

"Look!" Liu Yi pointed to one of them and said, "This is the previous one." ”

Picked up a stone from the ground and hit it, a trigger bracketed, the stone shot out about three feet away, Liu Yi made a mark on the ground, and then picked up the stone and installed it on another catapult model, as concocted.

Three feet six!

Guan Ping looked at the catapults that were not much different from each other with some surprise, and the range was so much different? If this is true, then the gap is probably fifty or sixty steps!

"That's the gap!" Liu Yi looked at Guan Ping and said with a smile, if it weren't for the big gap, he wouldn't have bothered to design.

Guan Ping nodded when he heard this: "If it is really so powerful, if there are thirty such catapults, why worry about Nan Zheng not breaking?" ”

"I also have to cooperate with ladders, wells, and city vehicles." Liu Yi groped his chin and said.

After all, catapults are on the battlefield, and their deterrent effect is greater than their actual lethality.

"Sir!" Huang Zhong opened the curtain and entered, came to Liu Yi's side, and arched his hand: "General Wei sent someone to deliver a letter. ”

"Oh?" When Liu Yi heard this, he took the letter handed by Huang Zhong and looked like the smile on his face gradually disappeared.

"Sir, what happened?" Guan Ping wondered.

"Wei Yan's soldiers can't move for the time being." Liu Yi handed the notebook to Huang Zhong and sighed.

He didn't expect that the battle of Weiyang would be so tragic, and the army brought by Wei Yan was gone, it was the elite division brought by Jingzhou!

Broke Yang Bai first, lost hundreds, and then fought several days of offensive and defensive battles with Yang Ren, Wei Yan's soldiers and horses were constantly consumed in battles again and again, and now, there are only less than 300 troops left, Liu Yi told Wei Yan before that it was difficult for some strongmen to sneak attack Yangping Pass.

Huang Zhong finished reading the book, and sighed silently, three thousand people fought to the remaining three hundred, even if it was a battle to defend the city, and it was a loss added up for several days in a row, it could not collapse, in addition to being all Jingzhou soldiers, it was already very rare for Wei Yan to be able to do this, even if he did not participate in it personally, he could imagine the tragedy of that battle.

This time it is a mistake in Pang Statistics, of course, there are also reasons why Wei Yan is eager to make meritorious contributions and is too rushed, in short, he failed to achieve the strategic goal in advance, but Sai Weng lost his horse and knew that it was not a blessing, this time was a blank period, Cao Cao had just returned to the court, and it would take a while for the news to react to the news in Hanzhong, and this time was just the right time for Liu Bei to have the opportunity to seize Hanzhong, and at the same time, he could continue to ask Liu Zhang for money and food to strengthen himself by attacking Hanzhong.

"As long as the person is fine, send someone to send a letter to the chief for me, and then send someone to urge the lord." Liu Yi sat down and said.

In such a large camp, there are actually only 500 people, Zhang Lu only needs to send someone to test it, and he can find that Liu Yi seems calm, and even dares to go to the bottom of the city, but in fact, he has always lacked a sense of security in his heart, and he is afraid that Zhang Lu will not want to send someone over to test it again.

Fortunately, Huang Zhong played well the day before yesterday, which scared Zhang Wei and Zhang Lu.

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