The defense of small settlements mainly relies on cultivators.

The defense of large settlements is mainly based on the national army.

At this time, there were five military regions left in Shenzhou, stationed in the five capitals, southeast, west, north, and middle. Each capital was a thousand miles in radius, with the backs opposite each other and relying on each other. With the central Beijing Chang'an as the core, it formed a concentric circle, with 2 million troops stationed each.

The army was divided into dragon teeth, tiger teeth, wolf teeth, leopard teeth, and a large number of ordinary soldiers, mainly cultivators.

The role of ordinary soldiers is also very important, because the main force of monsters siege is low-level monsters and wild beasts without monsters. The country has built some positions and arranged special guns and cannons to kill monsters below the foundation building. Monsters that exceed the foundation building stage will be dealt with by cultivators, including people from folk sects.

In the spring of 2150, Qin Di summoned the heads of the five major military regions to discuss matters as the "chief national teacher" in the Spring and Autumn Palace of Kunlun Mountain.

The five generals, together with the Minister of the General Equipment Department and Lieutenant General Zhang Liang, went to Mount Yuzhu under the escort of the troops.

On the way, Zhang Liang couldn't help but complain: "Why did this great master summon us? He has such a high martial arts skills. If he wants to see us, why don't he go to Chang'an in person? We have to escort hundreds of people when we go out. How difficult is it!"

The general Li He from Zhongjing was also traveling west with him, and said, "The great national master is leisurely and leisurely, like a wild crane, unlike us, who is so busy that he doesn't touch the ground every day! He doesn't understand our hard work!"

Equipment Minister Zhang Liang said: "Last month, we produced 30,000 large-caliber alloy blocking guns. After they were fired, they were welcomed by various troops. Many people urged to speed up the production of more guns. But this alloy is too difficult to deal with! It actually requires heavy metals such as gold and silver, and more than a dozen rare earth elements, which made me worried. Nowadays, many mining plants have been lost, Shandong Gold and Zijin Mining, and these places have been abandoned. Where do you ask me to find more gold? Fortunately, we have guarded Baiyun Ebo in Baotou, and Jiangxi Mineral Rare Earths, and rare earth elements are not short of... "

Li He said: "I heard that this alloy formula was provided by the great master more than a hundred years ago! Is there no new progress in the past few years?"

Zhang Liang shook his head and sighed: "We have hired many scientists and conducted a lot of research, but have not broken through this formula! It's really weird to say. Where did the great masters get the formula?"

"God knows that this person has the power of unpredictable ghosts and gods. He is the only true Lord of the Nascent Soul. If he is willing to take action, he can sweep all the great monsters in the Asian continent, but for some reason, he rarely takes the initiative."

"Did you look at the recent 'Demon Hunting Heroes List'? In addition to the unparalleled national scholar Gu Ruhu, there are also Du Rong and Du Lan. They are all from the Spring and Autumn Palace. With these people leading to hunt monsters, the great national master hiding leisurely in Kunlun Mountain."

"What you know is not the latest ranking. Just yesterday afternoon, something happened. It sounds strange. There are three big monsters who lead tens of thousands of monsters and beasts to attack Lop Nur. At the beginning, the offensive was very fierce. Fortunately, Lop Nur arranged a large defensive magic array, so the monsters did not attack. Later, guess what, Gu Rumei sat upright in the formation and played a guqin song. Then Gina came out alone and swung his sword to kill the three big monsters. It is said that the three big monsters did not react, as if they had become dementia! Afterwards, Gina jumped to the second place in the demon hunting hero list! He squeezed Du Rong and Duran into three or four places!"

"Ah? Gina killed three monsters alone? Does she have that high strength?"

"Someone responded that it was Gu Rumei's piano sound that played a restraining role!"

"I don't understand, can the piano sound destroy the monsters?"

"Gu Rumei is Qin Di's apprentice, and she also has unpredictable means."

"I heard that she has always been single?"

"What's wrong with being single? Many powerful cultivators are unwilling to get married and have children. Since they embark on the path of cultivating, the meaning of living is different."

The two chatted all the way, and arrived at the foot of Mount Yuzhu and saw four other generals.

They were pulled by someone, and they came to the mountainside, entered the Spring and Autumn Palace, and met Qin Di.

At this time, Qin Di looked in his twenties, much younger than these six generals!

The six of them sighed for it, knowing that the great national master is 250 years old and is more than enough to be their grandfather, so they respectfully treated him and bowed to him, "I have met the great national master."

Qin Di nodded and said, "I invite you to come because I want to show you something. I have developed a new type of spiritual cannon that can kill the great demon of the Golden Pill stage in one shot."

All six showed surprise.

"What is a spirit cannon? What is the difference between it and an ordinary cannon?"

"Where is the spirit cannon? Have you made a model?"

Qin Di said: "Please come with me, and the spirit cannon is placed on the cliff on the west side."

Everyone followed him out of the Chunqiu Palace, and walked upwards along a mountain road to a raised platform, with a disciple guarding there.

There is a cannon on the platform, with silver light shining, and the cannon is covered with fine patterns, looking like waves, layer by layer, looking very beautiful.

Qin Di said: "There are many kinds of spiritual cannons, which are just low-level spiritual cannons that can kill the golden elixir monster. It requires special shells."

What he didn't say was that if it was a high-level spiritual cannon or an immortal-level cannon, it did not require shells. It was extremely powerful and could kill immortals, but if you want to inspire, you must have immortal stones.

Everyone stared at him to see how he tried the cannon.

Qin Di asked someone to push a large iron ball from the side, with a diameter of about one foot, and was also covered with strange patterns. He put the large iron ball into the cannon chamber, and then threw ten spirit stones into a groove, saying: "The range of the spirit cannon is 200 kilometers. After it is shot, you can't see it. I'm not going to hit that far this time, so I'll find a nearby mountain, a hill twenty miles away, and you can send someone to take a look later."

Then, he moved the button, and the cannon shook violently, emitting a white light!

Everyone did not see the cannon ejected, but they saw white smoke coming out of the rock walls of the hills in the distance.

While they were watching with a telescope, they instructed their subordinates to go to the hill to check the effect of the shell strike.

An hour later, the officers under his command came to report: "The shells penetrated 100 meters deep into the mountain, forming a cave with a diameter of two meters!"

Everyone was shocked: "How can a shell with a diameter of one foot be able to shoot a cave with a diameter of two meters? The cave was not dug in advance, right?"

Qin Di smiled and said, "The key to the spiritual cannon is that the body of the cannon and the runes on the cannon shells are also related to the materials used. I use silver cannons and iron cannons, among which silver cannons are mainly silver, accounting for 57%. In addition to other metals, there is no precious metal such as gold; iron cannons are mainly iron, accounting for 62%. In addition to other metals, there is no gold."

Someone said: "It turns out that the runes have made contributions. Great Master, is such a rune easy to draw?"

Qin Di said: "You send someone here, at least you need the foundation-building monks. I am responsible for teaching them to draw such talismans."

Zhang Liang bowed and said, "Please provide the formula for silver cannon iron shells."

Qin Di nodded: "No problem, I'm ready."
Chapter completed!