"Prime Minister!" Lei Jiaojie said: "Liu Dehao led King Ju out and went all the way south, and the two sides fought in the trade city. ”

"Trade City, Ruihe, my Changling sailors are still not there, how many thousand?"

"Yin Shenglin has not yet arrived in Changling, I ordered the navy to be transferred to the east, there should be more than 20,000, there are not many warships, hundreds of them, most of them are large ships, equipped with firearms."

Tong Wen applauded: "God really helps me!" Liu Dehao can be regarded as blocking his back road this time. Trade City is a water city, the most suitable place for water warfare, now immediately mobilize the water army and attack the trade city. ”

……

Trade City, along the Rui River.

"It's about the same fight, it's time to transfer someone." Lobby said.

Zhang Shaoyun also arrived just in time: "Miss Wu is already on the way, and King Jing has not been notified yet." ”

"There's no hurry." Liu Dehao nodded and continued to watch the good show outside: "I'm waiting for someone." ”

"Who?"

"Tong Wen."

"He can't even get together 100,000 people in his hands, will he still come to fight and make the last struggle?" You Xiu asked.

"There are no more people, but you forgot that Changling has an army that is not used all year round."

"Water...... I see, this is also the reason why you asked King Jing to help, right? ”

"Lord Jing hasn't done anything else over the years, he has been training on Linghan Island, and he has invaded the Black Country many times on the coast of the Yanhai Sea, and his sailors are superb." Liu Dehao said: "The naval army of Changling is nothing more than some pretending soldiers, and they have no combat effectiveness at all. ”

You Xiu smiled: "Then after we finish this battle, we can go back to Changling, right?" ”

"It's hard to say what the future will be." Liu Dehao brought a bamboo slip, drew a symbol casually, and handed it to You Xiu: "You send someone to send this to King Qi, even if he can't see it, Wang Fugui should be able to understand." ”

"Ghost Drawing?"

"This is called Yin Shu, what do you know, go quickly!"

The most important thing for a soldier is to keep secrets, military intelligence is often more important than military strength, and the transmission of military information is the most important thing. From ancient times to the present, there are various ways to transmit, in order to keep secrets, the masters have their own strange tricks, and the tricks can be said to be endless.

The Fengsui system practiced in the Warring States Zhou Dynasty was a military communication system. What people often call "beacon tower" is actually "beacon tower". The beacon fire is an important alarm signal used at night, that is, a wooden frame called "Jugao" is erected on a high earthen platform or stone platform, which is a wooden machine that can pull an iron cage or bamboo basket or wooden box. An iron cage was tied to the "Jugao" at any time, and the iron cage was filled with flammable firewood and grass, and once there was a close military situation, the gatekeepers immediately lit the firewood and grass in the cage to make a fire to the sky, so as to report the military situation. Sui is the wolf smoke lit during the day, that is, the smoke burned with wolf dung, which is characterized by rising straight in the wind, and it is also used to report military information. At that time, there were such beacons on almost every important route from Kyoto to the border gates.

Because the content of the beacon signal is simple and not easy to keep secret, people have created a new method of secret transmission in practice, which is the "Yin Fu", also called the "Yin Book".

According to legend, in the last years of the Shang Dynasty, Jiang Taigong assisted the Zhou family, making the Zhou family from weak to strong. Once, the Zhou army led by them commanded the camp was surrounded by rebels, the situation was critical, Jiang Taigong ordered the messenger to break through the siege, back to the dynasty to move troops, he was afraid that the messenger would forget the secret, and was afraid that King Wen of Zhou did not know the messenger and delayed military affairs, so he folded his cherished fishing rod into several sections, each section was of different length, each representing a military aircraft, so that the messenger remembered, not to pass it on. The messenger returned to the court after several twists and turns, and King Wen of Zhou ordered several fishing rods to be put together on the left and right, and personally examined it, and King Wen of Zhou identified it as Jiang Taigong's beloved thing, and personally led the army to the place of the incident, relieving Jiang Taigong's danger. Afterwards, Jiang Taigong took the fishing rod that made him turn danger into danger and turn danger into safety, and his wonderful ideas were like springs, and he improved the method of transmitting messages from the fishing rod, and invented the "Yin Fu".

The original "Yin Fu" was made of bamboo, and later it was changed to wood chips and copper sheets. The method is to cut the bamboo into different lengths according to the needs, and before the war, the relevant people secretly agree on the secret signs and contents, that is, use different lengths of bamboo to represent different contents. For example, three inches means that the whole line is retreating, four inches means that the army is defeated and will die, five inches means clearing grain and increasing troops, and six inches means holding the city; Seven means to block the enemy's army; Eight inches means to break the enemy and win the city; Nine inches means breaking the formation and capturing the general; One foot means defeating the enemy. The front line of this "Yin Fu" is controlled by the commanding generals, and the rear is controlled by the imperial military department, and it is transmitted by special personnel. There is no text on the "Yin Fu", no pattern, and the people who pass on the "Fu" do not know the meaning of the "Fu", even if they are captured and defect to the enemy, it is difficult for the enemy to decipher the content of the "Fu".

Later, with the development of culture, "Yin Fu" was gradually replaced by "Yin Shu". The so-called "Yin Shu" is actually a kind of military document, and the method of transmission is more secret. The method is to first write down the confidential content to be transmitted on a series of bamboo slips or wooden slips, then disassemble and shuffle the bamboo slips or wooden slips, divide them into three parts, and then send three messengers to deliver one copy to the same destination. After the "Yin Book" is delivered to the destination, the recipient puts together the three copies of the "Yin Book" in order, so that the content of the "Yin Book" is clear at a glance. This kind of "yin book" has better secrecy. Because even if a certain messenger is captured by the enemy, the "Yin Book" falls into the hands of the enemy, and complete information will not be obtained. In order to encrypt the secret, the ancients also used a variety of ingenious methods such as Tibetan poems, Tibetan tail poems, palindromic poems, poetry riddles, dumb riddles, and secret writing on the "Yin Book" to convey information.

Although these people do not know that there are high-tech encryption such as Morse cipher and function encryption in modern warfare, the so-called "Yin Book" is the prototype of encryption transmission.

……

Changling,

Yin Shenglin received Liu Dehao's "Yin Book", his eyebrows were unlocked, and he was puzzled.

The book has eight black dots, divided into four rows and two columns, the vertical dots are connected by groups of four, and only two or three lines are connected horizontally, like "H" more than one horizontal, and also like the word "well" with missing arms.

"Is this a ghost drawing?"

"His Royal Highness the King of Qi, we stole the prince and said, this is a military plane for you."

"We haven't used this before, have we?"

"The prince said that if His Royal Highness can't see it, General Wang Fugui can solve it."

Wang Fugui took a look at it, and said while nibbling on the chicken: "This is the well of the twenty-eight nights!" ”

"Twenty-eight houses are divided into nine fields, and the well is located in the southwest." Yin Shenglin said: "He told us to go southwest. ”

"Impossible, right?" Wang Fugui said: "The trade city is obviously in our southeast, what are we going to do in the southwest?" ”

"Where is the southwest of Changling?"

Wang Fugui took out the map he was carrying: "Huaikou County." ”