In the early morning of September 9, Shanhaiguan General's Office, Man Gui, promoted the tent to discuss matters and deployed Shanhaiguan defense. Since nearly 25,000 elite troops were transferred to Xiong Tingbi, he rushed to Ningyuan. Although more than 20,000 new troops joined the remaining 15,000 defenders, a total of 40,000 troops reconstituted the new guard force of Shanhaiguan. Man Gui meant to lead the new army with the old and incorporated all the new army into the old army, but Xiong Tingbi's urgent matter disrupted all his plan and had to temporarily put down the idea of ​​reorganization and deploy Shanhaiguan defense operations with all his efforts, arranged the soldiers of a hundred battles on the front line of the main city gates, and the soldiers of the other four towns were arranged in secondary and alternate echelons, and the after-all walks in front of Shanhaiguan were covered with mines.

Landmines appeared as early as this era. General Qi Jiguang first invented it and used it on the battlefield to fight against Japanese pirates. In short, the fate of this landmine and the Japanese devils is really great! The Ming Dynasty military book "Wu Beizhi" records the shape and characteristics of more than 10 landmines, and draws the structure of the landmines. Most of the landmines are made of stone, pottery, and iron. They are buried underground, and fire devices such as stepping hair, tripping hair, pulling hair, and ignition hair to kill the enemy.

In the period, landmines are mostly made of stones, with deep holes in the middle, fire inside, and then a small gap is left to insert into thin bamboo tubes or reed tubes, and then a fuze is pulled out. Then the medicine mouth is sealed with pulp mud, and buried where the enemy must pass. When the enemy is approaching, the fuse is ignited and the mines are detonated. This kind of stone mine is also called "stone bombing cannon". It is simple in structure, convenient for material use, and widely used in combat. However, it is gradually renewed due to the small amount of medicine and the small explosive power.

Zhu Yinglong was naturally overjoyed to learn that landmines had appeared in this era. The plot of the movie "The Japanese devils were blown by landmines by landmines is still in front of him. Under Zhu Yinglong's secret attention, firecracker expert Shen Yang spent more than a year studying it. Under Zhu Yinglong's consciousness of transcending this time and space, he first changed the original fire formula, and used the standard "Nite 7, Carbon 2, and Sulfur 1 to create a powerful black fire, and then changed the shape of the mine, and the shell cast with iron, especially the fire device was continuously improved, effectively expanding the effective anti-kill range of landmines. Due to the lack of more tests and confidentiality, there were not many. In order to help Ning Yuan, Zhu Yinglong spared no effort to save the trial mines, and took all the mines to Xiong Tingbi to the Ningyuan battlefield.

Shanhaiguan's city defense is far stronger than Ningyuan. There are more than a dozen red-clothed cannons, distributed on various crucial battlements. The black muzzles face the Guanxia. Mangui began to prepare for the war after receiving Xiong Tingbi's immediate documents. The news of the war was approaching quietly spread in Guanzhong. The cruelty of the Jin people had been heard of, and the people were panicked. Many people hurriedly packed up their tribute and fled south when the pass was broken.

"Old Man, don't worry, I have to send someone to bury the more than 200 mine cannons left by Magistrate Xiong, and I have to send someone to bury them in the lockdown. Guan Bao's golden dogs come here to celebrate the New Year first!" Zu Dashou said excitedly.

Man Gui was the chief general, and his mind was much heavier than Zu Dashou. Although he had already made plans to attack inside and outside the gate, with his years of understanding of fighting against the opponents with Jin soldiers, the combat effectiveness of the 20,000 elite cavalry was extraordinary. If the imperial court had such 20,000 elite troops like the Later Jin, what would he do if he was afraid of the Later Jin? Although Xiong Tingbi had 25,000 elite troops, they were all infantrymen. Although there were many chariots that restrained the cavalry and their troops were more than three times the opponent's strength, the number of victory in this battle was still 55, so how could he not worry?

"It is reported to the commander of Man, the cavalry of the Later Jin Dynasty has arrived five miles away!" From morning to noon, Mangui and the chief general of Shanhaiguan stayed on the Shanhaiguan city tower without taking off their armor.

Mangui picked up the telescope hanging around his neck and saw the rolling like a yellow cloud, the speed of movement was astonishing as the golden soldiers waved the yellow, blue, red and white flags, as if they were in front of them.

"Rare the wolf smoke and fight!" Man Gui had not experienced the cruel battle to defend the city, but this time was the only time that made his heart beat faster involuntarily. His blood seemed to be boiling. He turned around and looked at the faces of the generals behind him, and he also looked solemn.

As soon as Man Gui's order was issued, he heard the sound of horse hooves like thunder. The main generals of the passes on Shanhai Pass quickly took their seats and commanded the battle. The rolling wolf smoke was ignited, and the smoke column thick into the black ink rushed straight into the sky, heading westward. The news quickly reached the ears of Zhu Yinglong, the emperor who was checking the Shuntian Prefecture provincial examination in the Gongyuan Courtyard.

"What, the Later Jin soldiers invaded Shanhaiguan?" Zhu Yinglong's face turned pale when he heard the news. He hurriedly came out of the tribute courtyard. He stopped returning to the palace and drove directly to the Ministry of War.

"What's going on?" Zhu Yinglong asked the first question when he saw Sun Chengzong.

"Your Majesty, the old minister just received a secret letter from General Man of Shanhaiguan and was about to submit it to the emperor, but he didn't expect that the emperor would actually learn the news so quickly and come to the Ministry of War in person." Sun Chengzong said calmly.

"Where is the secret letter?" Zhu Yinglong looked at Sun Chengzong suspiciously. The war broke out in Shanhaiguan. This was related to the life and death of the Ming Dynasty. This communication method in time and space was really not satisfactory. Perhaps the news had already happened.

"Please read the emperor!" Sun Chengzong ordered people to take a tin seal cylinder, bowed and presented it.

Zhu Yinglong took the cylinder, removed the tin seal, took out the secret fold inside, and looked carefully. Mangui wrote down his battle plan with Xiong Tingbi in the secret fold in detail, but because the secret fold was delivered in a hurry of 600 miles, the four legs of the horse naturally could not match the eyes of a man, so it was still one step behind the wolf smoke, which caused Zhu Yinglong to be in a false alarm.

"Issued an order to secretly rectify the defense of the Ming Jingying Admiral and a complete curfew. After the You hour, no official, civil and gentry is allowed to appear on any street in the capital without my will. I am not afraid of him ten thousand, but I am afraid of him. It is better to be prepared than to be unprepared." Zhu Yinglong closed the secret fold of Man Gui.

"Your Majesty, it seems that this is too nervous. The old minister suggests that it is better to be tight inside and loose outside." Sun Chengzong hurriedly browsed Man Gui's secret letter and suggested.
Chapter completed!