It is a little difficult to solve the connection between the open space, Shang Wen thought with his chin in his hand.

Because, from the sky, the underground target is different, and the gunpowder weapons used now almost make people feel collapsed, and when the two sides have been fighting for a certain time, the gunpowder smoke fired can cover themselves and the opposing army. Artillery, in particular, was fired rapidly and intensively on a large scale. These fumes were a headache for the artillerymen.

Shang Wen doesn't have a good way to solve this problem for the time being.

Because when the Air Force and the ground were working together, radio had already appeared. The Air Force specially dispatched ground guides to assist the Army in operations. Obviously not right now. Electricity only exists in the laboratory.

"It's a bit of a hassle, but I think you can give a lot of flags to the ground, or whatever. Because I can't help it. Shang Wen said.

"Yes. Then I'll go to the Celestial Army and see what new tricks they have. Wang Jian said.

"I think you should check it out. And look at the subjects they train, so that you can arrange the drills. Shang Wen said.

"Well, thank you Mr. Qin for your advice." Wang Jian said.

"Pointing doesn't count, it can only be regarded as thinking of something." Shang Wen replied.

"By the way, do you have a plan for the drill now?" Shangwen asked.

"Plan?" Wang Jian asked.

"That's right, it's the plan, for example, when and where the various branches of the army will be, and the participating troops. And how to exercise, who plays the Blue Army and who plays the Red Army. How to referee in exercises. Wait a minute. Shang Wen said.

"That's right, I came back from the Heavenly Army to ask about this question." Wang Jian said.

"Then I'll take a look at the lab. Can you solve the air-to-ground connection? Otherwise, you're going to be in big trouble. Shang Wen said.

With that, Shang Wen and Wang Jian said goodbye to each other. Shang Wen is going to go to the lab and try to make something useful. But think about it, what can be done now, the lack of materials has reached an alarming level, and it is difficult for a good woman to cook without rice. If you have no knowledge, you can't do it without materials.

Shang Wen had a headache when he thought of this. Signal flares, smoke bombs can't be made, but fireworks bombs can. Originally, this was a holiday celebration, but now it can only be borrowed temporarily. However, this requires a lot of paper, and now I am in a hurry to use it, and I can't manage so much. If possible, seek additional materials before proceeding later.

As soon as Shang Wen arrived at the laboratory, he found a person waiting there quietly. A stranger. Shang Wen didn't recognize it. However, judging by its attire, it is a member of the army.

"You are?" Shangwen asked.

"Report sir, I am the Engineer Academy of the Army Military Academy, and my subordinate is Cao Xin. There is something under the subordinate that needs to be checked by an adult. Cao Xin said.

"What's that? Sit. Shang Wen pointed to the spring sofa in the laboratory.

"Don't dare, don't dare. This thing was obtained by his subordinates with nitric acid, sulfuric acid, and mercury. Cao Xin said.

"Thunder mercury." Shang Wen said in surprise.

"What? What do adults say? Cao Xin asked.

"The reaction of two acids with mercury yields thundermercury. This thing is extremely sensitive and capable of exploding. Where is the stuff? Shang Wen asked.

"Don't be afraid, small ones will find that this thing can't easily explode when it is placed in grease." Cao Xin said.

"Hey, hey." Shang Wen smiled.

"Your Excellency, don't you suspect that your subordinates are laughing." Cao Xin asked a little overwhelmed.

"No, no, no." Shang Wen waved his hand.

"I'm glad that this thunder mercury, adding oil, fat or paraffin can blunt it, that is, reduce its sensitivity, and this thunder mercury passivation treatment is good. It can change the status quo of muskets on a large scale. Shang Wen said, holding Cao Xin's shoulder with his hand and pressing it on the sofa, the elasticity of the sofa scared Cao Xin and didn't dare to sit down.

"It's okay, it's okay, it's a sofa, it's more comfortable to sit on." Shang Wen said. Cao Xin sat down boldly.

"Need something to drink?" Shangwen asked.

"No, no, my subordinates are not thirsty." Cao Xin said solemnly. Shang Wen had no choice but to pour a glass of water. Hand it to Cao Xin. Cao Xin thanked him. Shang Wen waved his hand and was not welcome.

"Today's muskets are flintlock muskets, which are more troublesome to load, especially when loading propellants, if you don't replace flint and other objects in time, the musket will not ignite, which is very bad." Shang Wen sat down and said.

"Now with Mercury, this problem can be solved. This thing has been blunted to make a fire cap, and our muskets can be changed to a firing type. This way, the firing speed is faster and the reloading is very simple. Shang Wen said.

"Really, sir." Cao Xin said with some excitement.

"Really, and besides, if this thing is made into a detonator, it can be made into an initiating device. The use is very wide. Shang Wen said.

"Well, that's great." Cao Xin said.

"You are also an invention, go back to Master Meng Yimeng and fill out the form. Apply for a patent, and if you still want to research, try to avoid crowded places and pay special attention to safety. This isn't child's play. The slightest movement will explode, and the temper is very uncomfortable. Just like last time, you engineer cadets did it. Shang Wen said.

"Not anymore. We must pay attention. Cao Xin said.

"They're developing too fast. Nitroglycerin was developed, and the explosion power of that thing was ten times more powerful than black powder. Shang Wen said.

"Last time, our engineer brothers gave the adults trouble." Cao Xin said with some guilt.

"Nothing, you should be encouraged, respected. Explosives are not like anything else. The danger is too great. It explodes at every turn, and it's incredibly powerful. You should pay attention. Shang Wen said.

"That's right. There are some things that you can take back and see. Be careful with confidentiality. This is confidential information. Shang Wen said and took out the manuscript.

"This is the material for all the explosives I wrote. After everyone has read the above things, they put them away and give them to me, and the above things are recorded in their minds. Don't say it, the materials for the experiment, you guys collect them yourself. You should also record some data. to rummage through later. As he spoke, Shang Wen took out some notebooks and pencils and handed them to Cao Xin.

"These things you do must be kept strictly secret. Remember to keep it secret. Shang Wen repeatedly asked.

"Yes, sir. Subordinates understand. Cao Xin said solemnly.

"Yes. Once these explosives are ready, they are properly preserved. Never mind. Leave these things to me to keep. Shang Wen said.

"Alright. You go to Montena and fill out the form. Shang Wen said and waved.