Zhang Yi felt that the formula of gunpowder bullets was very valuable.

Gunpowder bullets played a huge role in this war, and the Tang army used gunpowder bullets to catch the Turks off guard, and the powerful power of gunpowder bullets also made many people gradually know its importance.

Especially when applied to the war aspect!

China was the first country to develop gunpowder, but it was rarely used in warfare, because the feudal rulers thought it was difficult to control and was afraid of affecting his rule, so they all used it to make firecrackers.

This also led to the fact that foreigners later used what China first developed, and in turn used it to beat us, and the profound memory of this period of modern times is not only Zhang Yi, but also the pain in the heart of every Chinese.

Therefore, Zhang Yi has come up with this thing now, and he intends to let him carry forward it in warfare, and it is best to use it as a conventional weapon for the army, which will be more conducive to the research and development of gunpowder.

And I believe that Zhang Yi is not the only one who sees this, so Zhang Yi plans to use the formula of gunpowder bullets to lure out the person lurking in the shadows.

Although he heard that there were various methods of marching and fighting and governing the country and settling down in the Taiping Technique, Zhang Yi didn't think that that thing even recorded the new gunpowder of later generations.

Under Zhang Yi's deliberate arrangement, the news that he was preparing to conduct a new round of gunpowder bomb experiments also quietly spread, and the circle that spread out was not large, and only a small number of people knew about it.

But Zhang Yi knows enough, even if only a small circle of people knows, if the guy who is hiding in the dark wants to inquire, it will be easy.

And Zhang Yi's plan, except for the implementation of the eleventh month, no third person knew, even the housekeeper Lao Zhong, who had been following him and was loyal to him, Zhang Yi did not say anything.

To be honest, he didn't doubt Lao Zhong, he was just worried that Lao Zhong would leak his mouth, after all, that guy was able to hide by his side for so long, and his ability was definitely not small.

After arranging things, Zhang Yi threw everything to Yue Shiyi, he didn't want to joke with his life, it would be good to let Yue Shiyi pretend to be himself, so that he didn't have to risk himself, and he could find time to do other things.

Of course, all this has to be done secretly, and the first principle is secrecy.

Things were arranged, and he looked at the Zhang Yi who was pretending to be Yue 11 with satisfaction, but the real Zhang Yi pretended to be Yue 11 and quietly walked to the dungeon of Shuofang City.

He believed that Yue 11 would be able to handle it, unless that guy was very smart and didn't show up at all, otherwise he would definitely show his feet.

And myself, it's time to go to Princess Chengyi for a while, maybe that person's existence has something to do with her, maybe if that person acts, will Princess Chengyi also have any actions?

The old rule, Zhang Yi didn't interrogate Chengyi in the dungeon, or let people take her out, but he also arranged for a lot of people to follow secretly in secret, if someone wanted to do something, then Zhang Yi would definitely crack his mouth and laugh.

This time, Zhang Yi did not take Princess Chengyi back to his residence, because now Yue 11 was over there.

The group walked like this, talking as they went, and if it weren't for the wartime, no one would have thought that one of them would be brought out of the dungeon for interrogation.

"Tell me, isn't your purpose for the sake of peace?"

Zhang Yi doesn't follow Chengyi's ink, now that Yue Yiyi's side should be almost active, he also has to get something out of Chengyi's side.

Cheng Yi obviously didn't expect Zhang Yi to be so direct at the beginning, he was stunned for a while, and in the end, he nodded lightly.

Zhang Yi's deeds in Chang'an, she knows everything, although Li Er tried his best to cover it up for him, and Zhang Yi himself has always kept a low profile, but it is not very difficult for Cheng Yi to know these things, not to mention that too many things have happened in Datang this year.

"Well, let me tell you, the so-called Taiping Technique no longer exists, although I don't know where it is, but I can tell you unambiguously that it no longer exists in this world."

Zhang Yi lied very dryly, his face was not red and his heart was not beating. All his dangers seem to be due to the relationship between the Taiping Technique, if he can destroy that thing, Zhang Yi will definitely not be relentless.

Cheng Yi only smiled after listening to Zhang Yi's words, soldiers are not tired of cheating, she naturally will not believe Zhang Yi's words so easily.

Moreover, Zhang Yi's words made her more sure of the existence of the Taiping Technique, and it was very likely that Zhang Yi would know the whereabouts of the Taiping Technique, otherwise, a young man in his teens, even if he was in the sky, would not be able to make so many things during this time.

You must know that what Zhang Yi made has benefited the entire Tang Dynasty, if it weren't for Zhang Yi, His Majesty Li Er would definitely not have had such a good time this year.

"It doesn't matter if you don't believe it now, slowly, you'll believe what I say." Zhang Yi smiled at Chengyi and said, as if he was talking to her.

"Hungry, there is a store in front of you, I guess you haven't eaten very much in the past two days, look at your haggard appearance, don't eat more, how can you have the strength to calculate me." Zhang Yi's words are still so freewheeling.

If it weren't for Chengyi, but for the daughter of an ordinary family, it would have been played by Zhang Yi.

The two of them entered the store, ordered some food and began to eat.

Zhang Yi naturally didn't have much interest in these foods, and after eating a little, he watched Chengyi eat.

After the two finished eating, Zhang Yi took Cheng Yi and walked to his residence.

At this time, Yue 11 should be almost done, and he went back with Chengyi, just in time to use this to play psychological tactics with her.

The two chatted long and short, and soon arrived at Zhang Yi's residence, which seemed a little busy at this time.

"What's going on? What about the eleventh day of the month? With such confusion, it was obviously wrong, so Zhang Yi immediately called two soldiers to ask.

The two soldiers looked at Zhang Yi with puzzled eyes and said, "Pastoral Supervisor, didn't you chase someone out just now, why did you come back so quickly?" ”

Zhang Yi laughed, it seems that that guy was discovered by Yue 11, and the fake Zhang Yi of Yue 11 should be chasing that guy at the moment.

Thinking that the guy who always gave him strange feelings was about to be caught, Zhang Yi felt a dark feeling in his heart.

Let him peep at the master for so long, catch you this time, I want to see who you are!

Excited, Zhang Yi walked directly into his residence with Cheng Yi.

The next psychological offensive should start soon.