The Eighth Route Army that moved to Yan'an is still in the stage of recuperation, and although the Yan'an side has proposed a joint war of resistance, the chairman has not yet responded, because he simply does not look down on the so-called mud legs in Yan'an who have more people than guns. Yan'an is located in northern Shaanxi and does not have any industrial base, so the Eighth Route Army is notoriously poorly equipped. Tang Cheng proposed at this moment that he could help Yan'an to make weapons and equipment that were comparable to the power of ** and mortars, how could Xu Huanshan not be interested, the battlefield was fighting, and sophisticated weapons and equipment meant that the soldiers' loss rate was reduced.

"As you know, I have a lot of foreign friends, including some guys who are proficient in physics and chemistry. I once played cards with them, and I heard one of them mention that he once used an empty oil drum and a small amount of ** to make a large-caliber projectile weapon, which is more powerful than the average light mortar. It's just that the shooting distance is a little worse, only about 200 meters, but the advantage is that the material is simple and cheap, and it is easy to move. "The large-caliber projectile weapon that Tang Cheng is talking about at this moment is actually a conscienceless cannon that was used in large numbers by the Eighth Route Army a few years later.

However, according to historical time, the unconscionable cannon should have been in the winter of 1944, and Nie Peizhang, then the commander of the engineer company, first had this idea. After continuous exploration and experiments in the following years, the 4th Column of the Shanxi-Hebei-Shandong-Henan Field Army first used this projectile weapon in the 1947 Southwest Shanxi Campaign. Compared with mortars, which are also curved firepower, the firing range of the conscienceless cannon is shorter, but the conscienceless cannon is simple and varied. In the War of Liberation, with the continuous improvement of the technology of the unconscionable cannon, this large-caliber projectile weapon can not only throw powerful ** bags, but also can throw dozens of kilograms of stones or cluster hands**.

The projectile weapon that Tang Cheng mentioned to Xu Huanshan at this moment was a conscienceless cannon, and he was going to hand over this kind of projectile weapon that terrified the Kuomintang army to Yan'an several years in advance to equip the Eighth Route Army troops to deal with the Japanese army. There is no conscience cannon data, from Tang Cheng's system lottery, when he first drew this thing last night, Tang Cheng was also a little at a loss, he didn't know what the system was using to reward himself with this thing. Suddenly thought of the Shanghai underground party and Xu Huanshan, an old friend, Tang Cheng then realized, and rushed over to meet Xu Huanshan today, Tang Cheng's main purpose was to hand over the design drawings obtained by the lottery to Xu Huanshan to Yan'an, and intelligence sharing was just a temporary decision he made.

When he heard Tang Cheng say that the firing range of this large-caliber projectile weapon was about 200 meters, Xu Huanshan did not show disgust, but his eyes lit up. "Can you tell us more about that? I'm interested. Xu Huanshan immediately asked Tang Cheng urgently, but the latter did not answer immediately, but took out a piece of paper from the other pocket of his coat and slowly pushed it to Xu Huanshan along the table. Tang Cheng didn't speak, but Xu Huanshan's gaze had already fallen on the piece of paper on the table, no need to ask, this thing should be related to that kind of projectile weapon.

Xu Huanshan, who was already a little excited in his heart, immediately grabbed the folded paper and opened it slowly, the content on the paper really made Xu Huanshan ecstatic, this is simply a design drawing, and the blank space next to it is also marked with a lot of size data. Xu Huanshan, who had carefully read the content on the paper, couldn't think of what he wanted to say for a while, so he rolled his eyes directly at Tang Cheng, and then said angrily. "Do you have paste in your head? Such a precious thing, you actually put it in your coat pocket so casually? What if this thing drops? ”

Xu Huanshan's attention to this design drawing far exceeded Tang Cheng's expectations, and he was angrily reprimanded by Xu Huanshan for no reason, but he was not angry, but lit a cigarette, and then sat still with a smile. Xu Huanshan also came back to his senses at this moment, but he didn't mean to apologize to Tang Cheng, he just lowered his head and continued to look at the design drawings under disguise. "This thing seems to be a big oil drum, right? Can the structure of the oil drum withstand the blasting force of ***? ”

Although Xu Huanshan has been engaged in underground party work for a long time, he is not a scholar who does not know anything. Tang Cheng raised his eyebrows when he heard this, "There should be no problem, it's a big deal to add two iron hoops to the outside of the oil drum!" But the person I know said that the use of oil drums has a certain lifespan, just like the barrel and barrel, after reaching a certain service life, if you continue to use it, it will be dangerous! ”

The design drawings did not indicate how many times the oil drum used as a projectile barrel could be used, but Tang Cheng still focused on reminding Xu Huanshan at the moment, so as not to cause a big disaster in order to save materials. Xu Huanshan nodded when he heard this, "I know this, even if it is a good barrel and barrel, it will be scrapped after a certain number of uses, not to mention that this is just an oil drum." Xu Huanshan's words made Tang Cheng feel at ease, but Xu Huanshan's words changed sharply, but he mentioned another thing.

"Didn't you just say that there is a new weapon that is as powerful as **? This oil drum is the same, what is the other one? Xu Huanshan shook the design drawings of the flying thunder cannon in his hand towards Tang Cheng, although his tone was gentle, the meaning of it was already undoubted. Xu Huanshan's attitude of forcibly changing the topic and going straight to the main body made Tang Cheng, who was smoking, not come up in one breath and almost choked himself.

"Lao Xu, let's be considered old friends! Now it's time for you to take advantage of me for nothing, reach out and ask me for something, can you be a little more sincere! Tang Cheng, who couldn't cry or laugh, pointed Xu Huanshan with his fingers holding a cigarette, although he showed reluctance on his lips, but his empty left hand had already taken out another piece of paper from his pocket, but before he threw it on the table, he was snatched by the impatient Xu Huanshan.

"Bullet mines? What the hell is this? On the other piece of paper that Tang Cheng took out, there were also drawings and data, but those drawings and data were combined to make a drawing, and it looked very simple, and the materials used were only a bullet, a bamboo pipe and an iron nail. The thing Xu Huanshan was holding in his hand was not obtained by Tang Cheng from the system lottery, but after he decided to hand over the design drawings of the flying thunder cannon to Xu Huanshan, he drew the bullet and mine production drawings himself.

No one can say the origin of bullet mines, but when the US troops invaded Vietnam, the Vietnamese guerrillas, who were in a slight position, wantonly deployed these bullet mines with a simple structure in battle when they lacked equipment, with the purpose of causing injuries to the US troops and reducing the strength of the US troops by a large number. Tang Cheng provided the bullet mine to Xu Huanshan, not because of the idea of selling one for the other, but because of the guerrilla tactics that the Eighth Route Army was about to launch, and this kind of bullet and mine, which was not very lethal, was exactly the most suitable for the guerrilla tactics of the Eighth Route Army.

"That's right, it's a bullet mine!" The questioning expression on Xu Huanshan's face aroused Tang Cheng's desire to inform, and then he paused slightly, and then described the role and power of bullets and mines to Xu Huanshan in simplified language as much as possible. "This kind of bullet mine, although the structure is simple, and the material is only a bullet, a bamboo pipe and a nail, but after they are combined, coupled with a little clever arrangement, it will definitely have an unexpected effect." "But as you suspect, this thing is not very lethal, and when it is triggered, it will at most penetrate the soles of the trigger's feet. If you're lucky, a bullet fired from the bottom up can also hit the trigger's thigh or vital point in the lower body. ”

Tang Cheng reached out and took out a cigarette from the cigarette case, then compared the trigger with the palm of his hand and the ground with the tabletop, and demonstrated the whole process of the bullet and mine being triggered to Xu Huanshan. "Although this thing is simple, when it is arranged, it needs to be operated by a clever person. Compared to that projectile weapon, bullet mines are frighteningly cheap, and they can be arranged a lot at once. "Indeed, compared with the flying thunder cannon, which is often more than ten kilograms**, the bullet mine consumes nothing more than one bullet, and the bamboo tube and the iron nail at the bottom of the bamboo tube can even be recycled. However, Xu Huanshan frowned slightly when he heard this, obviously, he didn't think of this.

"But what if this kind of bullet mine that was laid down was not triggered by the Japanese army and was stepped on by our people?" The thoughtful Xu Huanshan had already thought of the possibility of the bullet mine being launched by his own people at this moment, after all, the target of this thing was too small, and it was still arranged below the ground. Xu Huanshan's thinking jumped so fast that Tang Cheng was dumbfounded, and after a few breaths, Tang Cheng just spread his hands to Xu Huanshan with a regretful expression.

"Then I can't help it! The kind of situation you are talking about, it is very likely to happen. If it were me, I could only suggest that those who arranged bullet mines must keep in mind the range of bullet mines they have arranged, and if they are not triggered by the enemy in battle, they must be recovered in time after the battle is over. Tang Cheng didn't dare to pack the ticket, guaranteeing that the situation Xu Huanshan said would not occur, so he could only say that he couldn't help.

Tang Cheng's answer made Xu Huanshan a little disappointed, but this meeting, he could be regarded as a full return, just the design drawings of the projectile weapon were already worthy of the Shanghai underground party's agreement to share information with Tang Cheng. After Xu Huanshan solemnly assured him that he would try his best to persuade the top level of the Shanghai underground party to share information, Tang Cheng got up and left satisfied.

Xu Huanshan has gained a lot today, and Tang Cheng, who has already gotten up and left, has also gained, Xu Huanshan is also one of the high-level leaders in the Shanghai underground party organization, since Xu Huanshan has expressed his willingness to share information with Tang Cheng, Tang Cheng knows that other high-level leaders in the Shanghai underground party organization will definitely know from Xu Huanshan's pass that he has released his goodwill to the underground party organization, after all, intelligence sharing is a win-win good thing.