"What, it can blow up the city gate. You must know that the city gate is not made of paper." Li Er was a little uneasy when he heard this. Civil and military skills are two necessary conditions for a good emperor. Yang Heng said that if a city gate is opened so simply, then, isn't it mean that the battle has been half won? This is why Li Er is uneasy.

Li Er himself was an emperor who had struggled from the battlefield. He naturally knew what kind of changes Yang Heng's words could bring to future wars. Even more excited than when he heard it was thunder in his palm.

Palm Thunder is a legendary magic. Even if someone can practice it and someone can achieve immortality, it cannot be said that Li Er will definitely achieve immortality. Therefore, he did not pay special attention to this matter, but when Yang Heng said it was useful in war, he would definitely be uneasy. This is a powerful tool for expanding territory. How could he be calm?

"This, I call it black gunpowder, but at present, I don't want to make this black gunpowder. I want to make a simplified version of it first, firecrackers, that is, an upgraded version of firecrackers, to celebrate the New Year and even to set off the atmosphere in some festivals." This is Yang Heng's real idea. This gunpowder was developed. In a small valley, security is okay. Besides, the legend outside is a palm thunder, so naturally it cannot be paid attention to for some other countries. If it is mass-produced, it will be exposed. Yang Heng is very confident that it will not be exposed, because in his past history, the nearby countries have not paid attention to this thing. In addition, firecrackers are simplified versions. Naturally, the power is very average. Naturally, it will not cause too much harm. It is not easy for someone to pay attention to this matter. If they really create it, it may be an updated version of Yang Heng.

"Have you brought this thing?" Li Er was still very anxious after hearing Yang Heng's explanation. He wanted to take a look. Is this thing really that powerful?

"Your Majesty, this is entering the palace. Do you think those guards can let me bring some unknown things in? I don't want to do some boring things." Indeed, maybe the guards would not think that this gunpowder was dangerous, but they would never let Yang Heng bring things in casually. Their duty is to protect Li Er, but whether Yang Heng is Li Er's son-in-law or not.

"This is also their responsibility. Let's give them an order to let them allow you to bring this thing in." Look, Li Er was anxious, but Yang Heng still didn't want to agree. He didn't want to start this. This is a new thing. It's better to be careful. Otherwise, when Li Er is unhappy in the future, wouldn't it be more troublesome to find Yang Heng's trouble?

"Your Majesty, I think it's still not possible. Otherwise, I will ask Your Majesty to move to the military camp outside the city, and then we will conduct an experiment under the surveillance of the soldiers." While opposing, Yang Heng made another suggestion.

"Okay, since that's the case, let's prepare for a while. I'm not in a hurry. I'm sending me an order to make the gate of a second-level city in the military camp outside the city in a one-to-one ratio. I want to see if what you said is true or false." Li Er also made up his mind. He naturally knew what Yang Heng was thinking, but Yang Heng was so careful that he had no choice. So that's fine. Didn't you say that you could blow up the city gate? I'll let someone build a city gate that was slightly worse than the gate of Chang'an City to see if you could really blow up the city gate.

"Then, Your Majesty, I will leave. I will go back and ask them to make some gunpowder in a hurry. Otherwise, how can your Majesty visit?" In theory, there should be no problem in bombing the city gate, but Yang Heng didn't know how much medicine needed to be put, so he needed to go back and prepare more, and then he had to calculate how to bomb the city gate to look better and show more power.

"Okay, go back. When the city gate is built, I will let you know, but you have to remember that if you can't do it, I will punish you for your crime." I don't know what grudges Yang Heng has with Li Er, but Li Er is thinking about curing his crime. You have to know that Yang Heng is still your son-in-law.

"Brother-in-law, brother-in-law, wait for me, I'll go out with you." Alas, it's over, don't think about it. It's Yuzhang's affairs that made Li Er hold a grudge. It's not my fault that Yuzhang likes me!

"Father, my son is gone, I want to go play with my brother-in-law." Well, don't add fuel to the fire. "Go, go." Li Er's face immediately became dark.

"This stinky girl, is it so bad for me? Did she not want to live in the palace all night? And this kid is so good that my two daughters are so obsessed with him?" Li Er said to himself hatefully.

"Erlang, let her go. Since she likes that kid, she has to do this. This kid has always helped you solve some problems, right?" Changsun came behind Li Er at some point.

"Guanyin Bi, I, I just feel unwilling to accept it. How can this kid attract my two best women?"

"Erlang, I think that the two of them can hold this kid's heart to you the greatest help. I don't know where this kid has learned so many things. Could that being called scholar is really a talent? But why can't he even pass the exam for a scholar?" Changsun raised his doubts again.

"I have arranged people to investigate this so-called scholar many times. It is said that he does not have any special skills. He just reads a lot of books. I don't know where he found so many books. He especially likes some ancient characters. It is said that he often explains some difficult words to the students, but no one can learn them well. Instead, a boy who eavesdrops outside learned them. It is said that it is God's will."

What God's will? How talented can a person who can't even pass the exam for a scholar? It's because he has no talent. Even the students he teaches are also some talentless people, which has created a sense of mystery for Li Er, which has allowed Yang Heng to escape the disaster. In addition, this person who called the scholar did not pass the exam in the previous dynasty, so there is no test paper left behind. Otherwise, as long as his test paper is investigated, the prototype will be revealed and this article should be over.

Yang Heng didn't know about this scene in the palace, but he quickly returned home, explained to his family, and then quickly rode his horse to the mountain again. This time his goal was to get the Taoist priests to install more gunpowder and then study the problems of the city gate with them.

Five days later, someone came to Yang Heng and asked him to bring gunpowder to the military camp outside the city as soon as possible, but Li Er couldn't wait.

Li Er really couldn't wait. In order to get the Ministry of Works to build this city gate quickly, he issued an order to the Minister of Works to supervise the production time many times, so he built such a city gate in such a quick time.

This city gate is naturally not a simple city gate, but is connected to the city walls on both sides. Otherwise, where can this city gate be supported?

When Yang Heng arrived, Li Er arrived at the military camp's martial arts field early, and there was a towering city gate in the distance. However, in detail, Yang Heng discovered that this city gate was smaller than that of Chang'an City. It seemed that in order to speed, the walls on both sides were built of stones. Fortunately, they did not use cement here, otherwise Yang Heng would have difficulty blowing up the city gate. The stones could be different. The stones were built with hooks. Naturally, the base would be loosened, and the city gate would fall off easily. If the city gate was blown up directly, the wooden city gate would be blown up, and there would be no too eye-catching effect. So Yang Heng planned to blow down the city gate first and then blow it away, which would look even more eye-catching, right? (To be continued...)
Chapter completed!