Hearing what Yang Xiucai said, Chen Hu also cast a puzzled look. Ouyang Xuan took the pen and paper in Yang Xiucai's hand, drew the shape of the grenade, and explained the production requirements in detail to Li San'er and Hu Blacksmith and his son while drawing.

After listening to Ouyang Xuan's explanation, Yang Xiucai said: "Brother Xuan, this is more delicate and portable than the thunderbolt, and the shell is also easy to hold if it is made into a turtle's back, but the size is much smaller than the thunderbolt, and the shell is much thinner, how powerful is it?" As far as I know, because of the large amount of iron consumed, the weight of the thunderbolt, and the power was slightly insufficient, only the Jinghu, Huaixi and other armies on the front line of the Great Song Army used a catapult to throw and use it when defending the city. Because of the lack of power and the cost of money, the Chongqing Mansion Pan system does not need to thunder."

Ouyang Xuan knew that since the Northern Song Dynasty, the Jin State and the Song army had used firearms in warfare, but firearms, as a new thing, were bulky and lethal due to backward design and production technology, and mainly relied on smoke to deter the enemy, but the effect of killing and injuring people and horses was not good, so the Sichuan Gorge Fourth Route Army, including Chongqing, rarely used it.

After listening to Yang Xiucai's words, Ouyang Xuan smiled and said: "This is an improved version of my thunder, although it is small, it can also kill the enemy, and you will know the power when I make it."

He chose the grenade as a breakthrough in the trial firearm, in addition to the relatively simple production of the grenade, the quality requirements for iron are not high, and it is easy to mass produce and easy to use.

Although the grenade has no low requirements for the quality of gunpowder, it is not a problem for him who is a chemical major.

As long as there are raw materials, not to mention black powder, even nitrocellulose and other powerful explosives, he will find a way to make them.

So his next stop was to go to the mining team and get the fire and sulfur things done. Then Ouyang Xuan took Yang Xiucai to the mining team.

Before the symposium was held, Ouyang Xuan asked Li Zhong and the mountain people who were familiar with the mine to take them to inspect the mine on the spot.

The villagers mainly mined iron ore, saltpeter, coal, and sulfur due to their small needs, and only shallow pits.

The iron ore and coal around Liuliba are abundant, and the quality is medium and sufficient, but the sulfur content is high.

The quality of saltpeter is good, but there are more impurities when collecting, and further purification is needed. The symposium with the mining team members was held on the flat ground in front of the iron mine cave, and Ouyang Xuan sat on the ground like everyone else.

According to Li Zhong, the person in charge of the mining team, in addition to the 10 people in the mining team, there are 34 villagers, all of whom were originally mining in addition to farming.

The crowd was very energetic and spoke actively, but there were not many ways to improve the output and quality, and most of the suggestions put forward were to pick up the omissions and fill in the gaps.

Ouyang Xuan was not surprised, after all, this was due to the limitations of the times, he had more than a thousand years of knowledge than them, and the opinions he put forward would definitely be beyond everyone's imagination.

Ouyang Xuan told the mining team four points: first, iron ore and coal should be the mainstay, and saltpeter, limestone and sulfur should also be mined.

Nitrate is the main raw material for the manufacture of black powder, and its importance is self-evident, and limestone can be used in construction in addition to steelmaking, and is also an important raw material for the next step in making cement.

The second is to increase the number of iron-making furnaces and immediately build a steel-making blast furnace. When Ouyang Xuan was working as a librarian, he had turned to the introduction of earth-based steelmaking, and at that time, in order to

"Super Britain catches up with the United States", and implements large-scale steel smelting in every household. The structure of the earth-based blast furnace that Ouyang Xuan wanted to make was simple, and he immediately dictated the form, construction, and use requirements, and Yang Xiucai recorded and drew the graphics and handed them to Li Zhong.

The third is to build mining camps and warehouses nearby, and he especially instructed that the storage of fire and nitrate should be kept away from the crowd and pay attention to fire and moisture prevention.

The purification method of fire nitrate was also recorded by Yang Xiucai and handed over to Li Zhong's team. Before leaving, Ouyang Xuan specially instructed Li Zhong to purify a few catties of fire as soon as possible, he had an urgent need.

To the teaching team is Ouyang Xuan's third stop, in addition to Cao Ergou's fire personnel, only a few cottage people participated, one of them was Ouyang Xuan and Zhu Zhuozi when they first arrived in Liuliba, and the two of them negotiated at the gate of the village, and he was also the person in charge of the cottage people recommended by Lu Dezhi.

Since Ouyang Xuan was not very proficient in military affairs, most of the matters of the teaching team were discussed by Cao Ergou and others, and Ouyang Xuan determined them.

Ouyang Xuan only emphasized the need to strengthen the concept of discipline and the training of orders and prohibitions, although he did not understand the march and combat in the era of cold weapons, but he understood that the combat effectiveness of the army came from organizational discipline.

Ouyang Xuan considered that the next step of Liuliba will be the development of industrial and mining industries, which requires a lot of labor, even if the people train in their spare time, it should not be too frequent.

Therefore, it is proposed that among the nearly 200 households and more than 800 people in the cottage, each household should elect a Minzhuang to carry out short-term military training, and the militia of 200 people should be divided into 10 platoons, with 20 people in each platoon.

In order to facilitate coordination, in the case that the teaching captain has been served by Cao Ergou, Shi Zhongshu is the deputy captain, and the fire personnel brought by Cao Ergou are respectively serving as the leaders of each platoon.

As for the weapons needed for the militia's military training, Ouyang Xuan had asked the industrial team to build spears and folding shields first.

The spear is powerful and consumes less iron, and it is the main weapon of the troops in the era of cold weapons. As for the folding shield, because the mountain road is narrow, several fire commanders have complained many times that the big shield is inconvenient to carry and unfold, so Ouyang Xuan thought about making a large shield composed of three parts, which is connected by an iron loose leaf in the middle, and is usually folded and stored, and when it encounters an enemy, it is unfolded and locked by an iron latch.

This folding shield is taller and wider than the original big shield, the covering area is larger, and the ability to protect arrows is also stronger, as for the protection in close combat, it is slightly reduced, but in Ouyang Xuan's thinking, there is no intention to fight melee combat in the future, and only by using firearms can you win against the Mongols, as for the mountain bandits, it is not a concern.

After the teaching team finished deliberating, it was already dark, and Ouyang Xuan took Yang Xiucai to visit Yu Zhu. Compared with the previous two days, the condition of Yuzhu disease has not improved, but it is no longer a long period of lethargy.

Ouyang Xuan took advantage of Yu Zhu's soberness to explain the recent situation in detail, and Yu Zhu was very relieved after hearing it, but Yu Zhu fell asleep in a daze after half an hour.

After instructing the caregivers to regularly feed herbs and eat carefully, Ouyang Xuan returned to his residence and lay down.

Tomorrow he has to get up early and go to the trade team and the guard team to talk.