After reading Zhou Nan's letter, Gao Yuan grinned non-stop, handed the letter to Yang Keshi again, and sent someone to move a full 200 explosive arrows to the room.

Looking at the two boxes full of explosive arrows neatly arranged, Gao Yuan rubbed his hands excitedly and said: "With these explosive arrows, I don't need Da Lang to come over, I will take people to blow up these Pingzhou troops!" ”

"Da Lang can say that he has to wait for him to send someone to deliver the message, so that he can send troops inside and outside together, and blow up the grain and grass and the enemy commander with explosive arrows, so that the enemy army can be taken by surprise and the enemy army will be in chaos, and finally the whole army will be defeated." Yang Keshi reminded on the side.

"Don't worry, I won't use these explosive arrows right now. I just don't know when Da Lang will send a message to send troops to bomb these Pingzhou troops. Gao Yuan said as he rummaged through the explosive arrows. Since the release of the magic car, Gao Yuan and Yang Keshi have been watching the city wall day and night, for fear that the Pingzhou army will suddenly attack Zunhua City. His only confidence was that Yanjing would definitely send a large army to relieve the siege. Zhou Nan spent the New Year in Sanssouci Village, and it was estimated that he would not be able to come for a while, and he guessed that it would be Xiao Lao Liu who came with the Black Iron Army. Who knew that Zhou Nan actually brought someone to arrive in time, and specially sent him two boxes of explosive arrows with a detailed letter attached to the magic car.

"How do you think Dalang came up with it? I can even think of using lights to transmit messages at night and flags during the day. Yang Keshi felt a big head when he thought of the dense words in the letter. However, he really admires Zhou Nan, a little light at night can shine far away, and from a distance of more than ten or twenty miles, he can naturally see a bright and dark light in the distance. What short bright, short bright, short light represents which word, short bright, long bright, short light and which word, as for the corresponding words, they are written in the letter, and the person who transmits and receives the letter only needs to write down the light of the other party, and then return to the ground and find out the words in the letter one by one, and the content of the letter to be delivered by the other party will come out. There is also a flag language, Yang Keshi only knows that when you are fighting, you are a member of that team, so you will follow the color of your team's flag, raise the flag to advance, and stop when the flag is raised. He never thought that he would be able to send a message to the other party by raising the flag in different directions.

Use the language of lights at night and the language of flags during the day. It has to be said that this is the fastest and most stable way to send messages in the case of being cut off from reinforcements. If you want to send someone to sneak over, you are sending someone to die; If you want to use two magic cars to alternately lift off to deliver letters, it is too slow, and there may not be a wind in the direction of reinforcements; If you use carrier pigeons, you will not be shot down by the enemy, or you can use harriers to peck the carrier pigeons to death and eat them. These methods that Yang Keshi can think of, I believe that the Pingzhou army is also on guard.

"On this page, Da Lang asked me to hand it over to a safe and reliable person, and not to lose or leak the secret. It's better to give this message to the fourth brother of the Eagle Guard, and he doesn't need to charge into battle, and he is clever and reliable, and he doesn't have to worry about losing it. Gao Yuan thought for a while and said.

"Exactly. Moreover, the people of the Eagle Guards will drive this magic car, and it is most suitable to use them to send messages. However, according to Da Lang's arrangement, in the past few days, he will use the magic car to investigate the stationing and encirclement of the Pingzhou Army outside the city, and practice the lantern language and flag language, so this matter will be handed over to the fourth brother Zuo! ”

"Yes, yes, yes!" Gao Yuan nodded and said, "This can't be delayed!" Investigate it early, and blow up the fuck with an arrow sooner! ”

Gao Yuan said to the soldiers beside him: "Go and invite Fourth Brother Zuo to come over." ”

Zuo Xiaosi has been bored these days, and it just so happens that he has nothing to do tonight, so he went to the camp in the city to talk to his partner. Hearing what the defenders outside were talking about, Zuo Xiaosi hurriedly ran out, just in time to see two of Zhou Nan's guards and soldiers driving down in the god car.

Zhou Nan's guards and pro-army had an extra leather bag behind their waists than other soldiers because they were carrying explosive arrows, which also became a symbol of Zhou Nan's pro-army, so Zuo Xiaosi recognized it at a glance.

Seeing that it was Zhou Nan who sent someone over, Zuo Xiaosi happily ran over to greet him, but these two were in a hurry to see Gao Yuan and Yang Keshi for something, and left with explosive arrows, leaving Zuo Xiaosi to rewind the magic car balloon with pity.

After Zuo Xiaosi led people to carry the magic car to the courtyard where he lived, he happened to meet someone sent by Gao Yuan, and Zuo Xiaosi knew that something was wrong, so he hurriedly followed.

After listening to Gao Yuan, Zuo Xiaosi understood what he wanted to do. He took the page from Takato's hand, frowning at the strange lines on it, each corresponding to a word. Zuo Xiaosi looked at Gao Yuan, and Gao Yuan said with a smile: "Don't look at me, I don't understand." ”

"How do you get the message across?" Zuo Xiaosi said bitterly, suddenly came to his senses, and said: "I understand, Brother Gao, you can't do it yourself, force it on me, you are driving ducks up the tree!" ”

"Since Da Lang only writes like this, then these are enough to understand." Gao Yuan coaxed Zuo Xiaosi and said, "I have worked hard in the past few days, fourth brother, take your subordinates to investigate the situation of the enemy army outside the city." ”

Zuo Xiaosi was helpless, so he had to go back with the piece of paper.

When he arrived at his room, Zuo Xiaosi continued to read this strange letter under the lamp. Raising the flag in different directions represents different words, and two flags in different directions can of course represent more words. Zuo Xiaosi can understand this flag slogan. As for the lamp language, is it possible that the light of this lamp is still long? It's weird!

His subordinate Wang Fu saw that Zuo Xiaosi hadn't slept yet, so he probed his brain and walked in, Zuo Xiaosi knew that this Wang Fu was thinking about the car, so he deliberately asked: "Fuzi, why don't you sleep yet?" ”

Wang Fu said with a smile: "Fourth brother, will you fly the god car tomorrow?" ”

"What's wrong?"

"I want to be the first to fly, hehe."

"And how high do you want to fly?"

Wang Fu was stunned for a moment and said, "Of course it's the highest!" ”

"If you want to fly the highest, then you can find the longest rope, how long the rope is, let him fly as high as possible!"

"Really?!" Wang Fu asked in surprise.

"If you are long-winded, it will be a fake!"

"Fourth brother, you wait!" After speaking, Wang Fu ran out of the smoke.

"! Listening to this tone is like going back and calling someone to beat me. Zuo Xiaosi said to himself, and then continued to read his page of "Book of Heaven".

After a while, Wang Fu happily carried a large circle of ropes and came again, Wang Fu unloaded the rope from his shoulder, and said to Zuo Xiaosi: "Fourth brother, what do you think?" It's more than 100 zhang, and I only need to fly 100 zhang tomorrow. ”

Zuo Xiaosi looked at the large coil of rope on the ground, the thickness was not the same, it was estimated that Wang Fu found several places to catch it together, "Fuzi, see you are so attentive, you will be the first to go tomorrow!" ”

"Thank you, Fourth Brother!" Wang Fu said again and again.

"Don't be in a hurry to thank you first, when you go up tomorrow, bring paper and draw the place where the Pingzhou army is stationed outside the city, and write down the number of people and horses, there can be no mistakes!"

"Don't worry! Can't be wrong. Wang Fu said with confidence.

"There is one more thing," Zuo Xiaosi suddenly said with a wicked smile: "If you see another divine car, you have to remember to pass on the message to the people on that divine car." ”