The setting sun lit the battlefield in a tiny orange-red hue, and the warm afterglow lit up the sky burning like a blazing fire.

Cao Zhang saw that the enemy army in Chang'an City did not move, and also realized that it was still difficult to directly stimulate Li Dao's subordinates to kill him, and he did not demand it, so he ordered all the troops to return to the camp, rest early, and wait for the final general attack the next morning.

The sun is fading over the horizon and night is beginning to fall.

The torches in the camp lit up the confusion in the darkness and illuminated the resolute faces of the soldiers, and there was a fire burning in their hearts, waiting for the decisive moment of the next day.

Cao Zhang and Xu Shu returned to the big tent of the Chinese army, the two guarded the sand table of the huge Chang'an City, discussing tomorrow's decisive battle, and also thinking about whether there was a way to ensure that their troops could enter the city smoothly.

"Ouch!" Outside the tent, there was a sudden exclamation of a woman.

Cao Zhang and Xu Shu raised their heads together, both slightly stunned, how could there be a woman's voice in this big camp? And it also appeared next to the big tent of the Chinese army.

Cao Zhang and Xu Shu quickly got up and walked outside the big tent, wanting to see what was going on.

The two walked out of the camp, but saw Li Jin holding a green sword on the neck of a soldier, and had already subdued the soldier.

"Season, what's going on, is there a spy?!" Cao Zhang knew that Li Jin was guarding outside the tent, and he was cautious, and he must have discovered the abnormality of this soldier before he took action to subdue him.

"Who is the spy? Brother Ziwen, it's me! The soldier shouted anxiously, but the voice of a girl familiar to Cao Zhang came out.

Cao Zhang was very surprised, hurriedly stepped forward to check, and waved his hand to Li Jin: "Season, let him go!" ”

Li Jin put away his sword and let go of the soldier.

The soldier looked at Cao Zhang and shouted anxiously: "Brother Ziwen, it's me, I'm Ma Yunlu!" ”

Cao Zhang looked at it fixedly, only to see that the person in front of him was really Ma Yunlu disguised as a soldier.

Li Jin gestured to Cao Zhang with his hand.

During this period of contact, Cao Zhang can also understand some simple sign language, and has already understood what Li Jin means.

Just now, Ma Yunlu sneakily wanted to drill into the big tent of the Chinese army, Li Jin thought it was an assassin before he made a move, but fortunately he recognized Ma Yunlu at the last moment, otherwise she would have been in a different place by now.

"Yunlu, why did you come to Chang'an and pretend to be like this to sneak into my big tent? If it weren't for the quick end of the season, do you know how dangerous it is just now? Cao Zhang said to Ma Yunlu with a bit of love and hatred.

"I am mixed in my father's army, I came with them, I have been in Chang'an for several days, I want to use my strength to help you break the city. Brother Ziwen, I'm looking for you in a hurry, I already have a way to help you break through Chang'an City! Ma Yunlu's face was filled with excitement and joy.

"Do you have a way to help me break through Chang'an?!" Cao Zhang looked at Ma Yunlu in disbelief.

After all, he and Xu Shu, a top strategist, have been thinking hard for many days, and they can't think of a better way, what can Ma Yunlu, a young girl who has just arrived, do.

"What I said is true, I really have a way, you just listen to me!" Ma Yunlu said anxiously.

"Okay, let's go into the big tent." Cao Zhang was reluctant to make a noise, and beckoned Ma Yunlu and Xu Shu to walk into the big tent together.

When the three of them entered the big tent, Ma Yunlu rushed to the sand table quickly, and said excitedly: "It's easy to do with this, I can say it more clearly!" ”

Cao Zhang and Xu Shu glanced at each other, and both of them followed Ma Yunlu to the sand table with curiosity.

Ma Yunlu pointed to the sand table and asked Cao Zhang: "Brother Ziwen, do you have no other way to break the city now except for attacking the city head-on?" ”

Cao Zhang nodded: "Yes, Chang'an City is firmly defended, and Li Dao can't hold it, except for attacking the city head-on, he really can't think of any other way." ”

With a sly smile, Ma Yunlu said to Cao Zhang: "Take a good look at this sand table, is there no other way to enter the city except for attacking the city?" I have a way to insert it directly into Li Wei's heart! ”

As she spoke, she directly picked up a small flag and inserted it into the position of Marshal Li's mansion on the sand table.

Cao Zhang still didn't look up to her, and shook his head helplessly and smiled: "You are on the sand table, of course, you can insert it directly, but in reality, our soldiers don't have the ability to go to heaven and earth, how can they insert it out of thin air!" ”

"We can't go to the sky, but there is still a way to go to the ground!" Ma Yunlu said with a firm expression.

"Miss Ma is talking about digging tunnels into the city, right? I had thought of this method before, but it was protracted and easy to be detected by enemy troops, so we didn't use it. Xu Shu responded to Ma Yunlu.

"Who said that we have to dig a tunnel by ourselves, Chang'an City itself has a ready-made tunnel, we can use it directly!" Ma Yunlu pointed to the sand table and said.

Xu Shu looked at Ma Yunlu suspiciously: "Ready-made tunnels, what do you mean?" ”

Ma Yunlu pointed to the ground in Chang'an City on the sand table: "The tunnel I said is under the current Chang'an City, and it extends in all directions, which is very convenient!" ”

Cao Zhang looked at the sand table, and then at Ma Yunlu, and a flash of inspiration suddenly flashed in his mind: "I know, I understand what Yunlu said about the authentic way?" ”

Xu Shu looked at Cao Zhang in surprise, obviously not understanding what the authenticity he and Ma Yunlu were talking about.

Cao Zhang hurriedly explained to Xu Shu: "Yuanzhi, Chang'an, like Luoyang, is a century-old ancient capital, and in order to prevent waterlogging, it has a very complete drainage system. And this drainage system, just under the ground of Chang'an, extends in all directions, leading directly to the eight rivers outside the city. If we arrange for someone to dive in from the eight rivers and swim up the drainage system, we can enter the city! ”

After all, Cao Zhang is familiar with history and knows that there were already drainage systems in Chang'an and Luoyang in the Han Dynasty, which is what we now call sewers.

So Ma Yunlu reminded him a little, and immediately thought that what she was referring to should be this underground passage.

Ma Yunlu looked at Cao Zhang with a happy smile, and exclaimed excitedly: "Brother Ziwen, you know so much, as soon as I said it, you thought of the drainage system." I had been walking around the city for several days, just in time for the drainage of the city, and I happened to see it before I came up with this solution. ”

After Cao Zhang listened to Ma Yunlu's words, not only did he not feel any complacency, but his mouth grew in surprise.

After all, he had the prophetic knowledge of crossing, and he couldn't even think of using the sewer system of Chang'an City to attack the city.

Ma Yunlu is just a first-time visitor to Chang'an, and he can discover the secrets of the sewers just by his own observations, and he can immediately think of the method of using the sewers to break the city, this mind is really powerful......

"Yunlu, you're wrong, it's not me who is powerful, it's you! So many of us didn't expect that you would solve our big problem in just a few days after thinking about it for so long, you are a genius! Cao Zhang admired sincerely.

"Yes, Miss Ma, if we use your strategy, we don't need to storm the city, we can reduce the casualties of the soldiers, enter the city by surprise, kill Li Dao, and capture Chang'an!" Xu Shu's emotions also became excited.

Cao Zhang and Xu Shu were both excited, and the problem they couldn't solve for many days was actually solved by Ma Yunlu.

Cao Zhang stepped forward excitedly, picked up Ma Yunlu and lifted it above his head: "Yunlu, you have done me a great favor, you are my great fortune!" ”

Ma Yunlu obviously didn't expect Cao Zhang to make such a move, and shook his body anxiously: "Brother Ziwen, what are you doing, let me go quickly, how embarrassed!" ”

Xu Shu saw the intimate behavior of the two, and hurriedly turned his head, not daring to look at it again.

Cao Zhang realized that his actions were too modern, after all, in this era, intimate actions such as kissing and hugging and lifting high cannot be done in public.

Cao Zhang hurriedly put Ma Yunlu down, and explained with an apologetic and embarrassed smile: "Yunlu, I was so excited just now. That's why I didn't control myself, I'm sorry! ”

Ma Yunlu looked at Cao Zhang's excited appearance, although he was a little embarrassed, but his face was filled with a happy smile, and he shook his head gently: "I know you're happy, it's okay." ”

"Yunlu, how can you have such ability and ability?" Cao Zhang asked Ma Yunlu curiously.

Ma Yunlu responded: "I liked to read war books and tactics when I was very young, and I hope I can help my father, after all, since I can remember, he seems to have been fighting for years." I especially liked the various strategies in military books, and many military books mentioned the importance of location, so I developed the habit of observing the terrain. ”

"It's just that my father always said that it was useless for girls to read, and I was not allowed to go to the battlefield, so I never had a chance to perform." When he said this, Ma Yunlu's mood was obviously darkened.

Cao Zhang looked at Ma Yunlu with understanding, he could imagine that in this era, especially in the northwest, Ma Yunlu, who grew up on horseback all the year round, must have been wronged and despised a lot.

He also didn't expect that Ma Yunlu, a girl who did not exist in history and only existed in various novels in later generations, appeared in the overhead world in which he lived, but he was such a character, and he also had the characteristics of liking to read military books and war strategies.

Ma Yunlu raised his head and looked at Cao Zhang: "Brother Ziwen, you just said that my strategy is useful, this time you won't say that girls are useless to read military books, right?" ”

Cao Zhang responded to Ma Yunlu very seriously: "Of course it works, and if we really break the city this time, you will definitely be the number one credit!" And I believe that in the future, you will also be my assistant in the fight against the world! ”

When Ma Yunlu heard Cao Zhang's words, his eyes instantly lit up: "Brother Ziwen, what do you mean, I can stay by your side and help you ...... in the future."

"Don't you want to?" Cao Zhang asked with a deliberate smile.

"Who said I don't want to, I do, I'm especially willing to ......" Ma Yunlu looked up excitedly to confess.

When she saw Cao Zhang's expression looking at her with a slight evil smile, she vaguely understood what Cao Zhang meant, and the girl's shyness instantly surged, only to feel that her cheeks instantly became hot again......