Two days later, at the Han army camp in the north of the city, one day at dinner, Li Su was called to have dinner by Liu Bei.

When you eat, you will be at the same table. It is a common courtesy in Liu Bei's camp.

To the extent that Guan Yu and Zhang Fei had to sleep in the same bed. However, Li Su couldn't sleep while listening to the snoring, so she refused repeatedly.

When he walked into Liu Bei's tent, Li Su saw a plan that was in the middle of the plan, with several pottery pots and pots, stewed horse legs, cooked horse shoulders, grilled horse steaks, and burned dead noodles.

There is no way, who made the battle more than ten days ago get too many seriously injured and too many dead horses, and they have not finished eating until now.

Now in the year of great famine, more and more hungry people gather in the military farms. Liu Bei himself had to save military rations, so he ordered all generals and civil servants not to slaughter livestock and eat meat before they were finished eating.

Although the ancients had poor methods of preserving freshness, the Northeast region was quite cool in spring and horse meat was easy to store. Find some deep wells that had not yet been melted, and slaughtered and washed horse meat was hung in a huge bamboo basket. It was hanging in the air without touching the water surface. It basically guarantees a low temperature of more than 500 degrees or more, and can be eaten after refrigeration for half a month.

If it takes longer, ordinary soldiers and hungry people these days don’t care about the slightest smell. But people who are so particular about Li Su would rather not eat it, and then they will be vegetarians for half a month.

"While the horse meat is still fresh for a week, eat more horse meat and eat less. After a week, you must be ready to continue vegetarian food." Li Su didn't want to have a special meal, so he thought so.

So as soon as I sat down, I picked up a piece of horse's leg bone and started gnawing.

Liu Bei gave him special treatment. He put a little clove on the legs of the horse in the pot to remove the sourness and smell.

After seeing that he had chewed a horse ankle joint, Liu Bei wiped his hands, took out a silk book from his arms, placed it on the table, and discussed:

"Just in the evening, when the army was sieging the city, the gangs and gold turbulently sounded at the top of the city, and then a whistleblower shot down. The army marquis who were pressing the formation felt something was a trick, so he picked it up. There was a reply from Yan Rou to us on it."

The whistle is an arrow that hollows out the arrows to form the bagpipe effect. When shot out, it will make a strange roar, which can attract people's attention even on a noisy battlefield.

Maodun Shanyu, a hero of the Huns, used the strategy of "Ming Di to kill his father" to kill Touman Shanyu to seize the throne. Therefore, the Hu people were very accustomed to using this kind of arrow.

Li Su was a little surprised when she heard this: "Yan Rou actually replied? What did he say?"

As Li Su expected, he had a counter-espionage plan with no dates, and no dates, so he had to kill Yan Rou, or even if Nan Lou killed Yan Rou, there shouldn't be a third possibility.

The Hu people know nothing about the plan? Even if Yan Rou doesn't fall into the trap, Nanlou will definitely be suspicious. But Yan Rou predicted Nanlou's prediction, wouldn't this suspicious chain be established?

Liu Bei broke a porridge and said while eating it: "It's roughly because Yan Rou expressed his willingness to surrender, but he was not strong enough to kill Nanlou. He can only offer the specific door. You can wipe your hands and read the letter."

Li Su read it roughly and finally understood the whole story.

Li Su smiled and said, "Yan Rou can do this, and she can still avoid our counter-espionage sword. He didn't kill either of them, but this kind of response was just a false surrender. He just wanted to win the trust of Nanlou. He wouldn't really think we would fall into a trap."

If the manpower is not good, how about developing some support structure?

Li Su's thinking habits are from later generations, so he will naturally quantify and analyze them.

Although he was a liberal arts student in his previous life and didn’t understand engineering calculations very well, he still had common sense and had seen many house decorations. He knew that the load-bearing of 12-digit steel bars used in projects was definitely fine.

How about urgently asking the blacksmith in the army to build some inch-thick iron rods to support the city gate?

However, the iron rod is too thin and can easily penetrate into the gate formed by thick trees, and it may not necessarily be in the right direction.

So, make a huge pallet at the upper and lower ends of the iron rod to increase the area of ​​stress and ensure that the city gate falls down and falls on the pallet?

This area is too large, and it is difficult for soldiers to carry it with them unknowingly, and it is easy to handle uneven collapses.

After thinking about it, Li Su quickly used the geometric thinking of ordinary middle school students and thought of a way to make a total of six iron rods, and the two ends of the iron rods were made into oblique slits like clothes drying forks.

At that time, all these iron rods will be carried by the cavalry as weapons. After reaching the city gate, they will immediately get off the horse and place them secretly, insert them in groups on the ground, and the last two are placed horizontally on it to form a "parallel bar" structure.

When the gate falls, it falls directly on the two iron rods.

I don’t believe that the three-fingered steel bars cannot resist the strongman’s door.

So Li Su immediately brought paper and pen, drew a simple painting on the paper, and explained to Liu Bei.

After Liu Bei looked at the diagram, his eyes lit up in an instant: Brother Boya has so much idea about strange tricks and tricks, and he reacts so quickly.

"Okay, if you have this method, you won't be afraid that Yan Rou will release the gate to lure and kill him!"

After the two of them decided to make the "parallel bar" 1,3,4 feet high and long, which is about three meters in the future.

In this way, the cavalry will not be more than two feet high when riding on the horse. The parallel bars are 10 feet high to ensure that after holding the city gate, the cavalry can still sprint through at full speed.

Moreover, the horizontal length is so long, so I am not afraid that the three-meter error of not aiming at the position where the gate falls when placing obstacles in the dark is not enough?

In addition, a 100-300-foot iron rod is more suitable for individual soldiers to carry Zhang Fei's snake spear at night. The cavalry held these parallel bar accessories, and in the eyes of the defenders on the city, they might be regarded as trident-like weapons.

"In addition, if our army agreed too simply, maybe Yan Rou would suspect that we had seen through his plan to lure the enemy and wanted to use the plan. It would be better that we would shoot Yan Rou back in the past two days and make more demands to make things difficult for him, which would make us hesitate. Even if we finally agreed, we would seem very cautious and sincere."

After discussing how to build a door-carrying parallel bar, Li Su added.

"Oh? What suggestions are good?" Liu Bei asked with great interest.

Li Su thought for a while: "I asked Yan Rou not to defend the city these days, and to allow our army to easily fill the moat near the city gate, and to allow our wooden donkey cart to cross the filled point, and to go to the other side to destroy the sheep and horse wall and resist horses."

Liu Bei thought about it: "Is this not easy to act? Yan Rou will definitely refuse because she cannot deceive the governor of Nanlou."

Li Su: "We can make excuses for him, such as asking him to allow us to build a well railing and shoot arrows at the city walls from a high position, so that Yan Rou can make excuses that "the archers on the city wall are at a high disadvantage and dare not look up and shoot arrows to suppress the Han army from filling the river."

As long as Yan Rou pretends not to think of how to counter our army's well railings, it is impossible to think of it. If Yan Rou wants to win the trust of us, she can only pretend not to think of it and pretend to be suppressed by the well railings. In this way, even if his ultimate lure of the enemy and surrender is useless, we will destroy two or three fortifications outside the city first. Wouldn't it be the best of both worlds?"

Whether Yan Rou hit the trap or not or stop in time, he will lose a lot.
Chapter completed!