Looking at the battle between the attacking and defending sides in front of him, Li Er discovered one thing, that is, Yang Heng's training of these sergeants, that is, to attack but not defend.

Why, this has to be seen from the fact that the two sides have the same weapons, but the attacker has a greater advantage, how can this be seen, it can be clearly seen that the shield of the besieging side is slightly less, and the bow and arrow are more, while the defender is different, basically the same bow and shield are basically the same, however, it is possible that the position above the city wall gate limits the expansion of the defender.

However, Li Er guessed one of them correctly, and also guessed Yang Heng's view of the war, in his opinion, the war is still better to attack, he doesn't like the defensive, the so-called defensive, is to be passively beaten, although the city wall will have a certain impact on the defender, but it is not an unsolvable thing, but Yang Heng just doesn't like the defensive, which can be seen from his previous training, his goal is to move forward, forward and then forward, and even said that the scouts in this barracks will be arranged to patrol every day, Sometimes he would arrange for people to conduct counter-reconnaissance training for those scouts, so that this team would be able to give a tight defense to the north of the entire city of Chang'an, at least within fifty miles, if there were enemy troops, they would quickly find their tracks.

When Li Er was thinking wildly, the attacking and defensive sides in front did not stop moving, the defenders above the city gate were still shooting, and the attacking side below was shouting slogans behind the shield and following the shield forward, this is the advantage of the attacker, this can start from the ballistics, shooting down from a high place, with his advantages, naturally there are his weaknesses. Other words. From top to bottom. The angle of this arrow is fixed, so as long as the shield is placed, it is easy to block the arrow in front, if the arrow is strong, the archer behind can push the shield hand behind the shield player, so that it can easily resist the attack in front.

The arrow designed by Yang Heng is a strong arrow, although the arrow is unscrewed. The place where the arrow can be installed is also made of iron, although this kind of arrow will not shoot and hurt people, it can hit people, if it is clever, it will also break the personnel, this is the offensive arrow specially designed by Yang Heng, and it is also the arrow of training, when training, if there is no arrow, the accuracy of ordinary arrows will be greatly reduced. You can use this kind of arrow, just like in actual combat. Even if there is some guarantee for life, it does not guarantee the safety of both sides of the training, so there is not much difference between a training and an actual battle, and even if you shoot skillfully, someone will die.

"General Yang, what kind of arrow are you, take one and show it to me." It didn't take long for Li Er to see the difference in the arrows, because he found that the soldiers who were hit were grinning their teeth, and it seemed to be very painful, so he was curious about this arrow.

"Your Majesty, this is a kind of training and actual combat arrow designed by Xuewen, during training, this kind of arrow can be recycled, even on the battlefield, it can also be recycled, but the enemy army can't use it yet." Dad arranged for someone to send an arrow to Li Er and explained to him.

"This, isn't it, this is your training arrow, and if it hits a person, it won't kill anyone?" What Li Er got in his hands was a complete set of arrows. "Your Majesty, there is also a mechanism here, and this arrow can be unscrewed down during training," Dad demonstrated to Li Er.

"Well, yes, good idea, no wonder you spend so much on it."

"Back to Your Majesty, this academic text says that arrows don't cost much, but most of them are on the bow, and if you don't have a good bow, this kind of arrow can't be shot."

"Oh, the bow, what kind of good bow it is, take a look at it." What a good bow, this is a bow uniquely designed by Yang Heng, in this era, if you make a good bow, it is difficult to make a bow without a few years, naturally, the good bow is used by some generals, even the life of a good bow is also limited, so there is a saying that the treasure of the town, in fact, it can't be used more, it is some representative meaning, and it is just a symbol of status.

But this kind of bow designed by Yang Heng is a kind of public bow, he is a bow body composed of hardwood and steel plates, with animal tendons, and even bowstrings made of animal skins, especially rare, the bow body is a separable part, once there is damage in a certain place, you can find accessories and then modify it, this is the focus of this bow, that is to say, this bow belongs to the product of assembly line operation, although it is valuable, but it is not expensive.

"What is this, a bunch of weird things." Dad was also a little ostentatious, and he didn't bring Li Er a finished bow, but the pieces.

"Your Majesty, this is a bow, you see, that's it, that's it, isn't a bow made." Left twist, right twist, and soon a bow was assembled in Daddy's hands.

"Well, yes, yes, let me try this strange bow." Li Er didn't look at the strength of this bow, but casually wanted to pull it away, "Oops, this actually requires a lot of strength, this is a two-stone bow." "The first one didn't use enough strength, this Li Er's face was a little unbearable, so he naturally told the strength of the bow, saving people from seeing jokes, and then with a force, the bow was pulled away.

"Yes, yes, by the way, can the soldiers pull this bow away?" "Back to Your Majesty, they can pull away, they are all trained, they can pull open five times at a time, so there is a segmented attack and segmented defense in front of the practice."

Dad's words solved a puzzle for Li Er again, and he was also wondering, why did the two sides of this drill have to practice like this, I see.

"Team A evacuates, Team B evacuates." When Li Ergang was about to ask again, he suddenly heard the order for both sides of the drill to evacuate.

"Your Majesty, now let the minister demonstrate the bombing of the city gate, the team attacking in front has already attacked under the city gate, in order to prevent losses, so the minister asked the soldiers near the city gate to evacuate, Your Majesty, look, is it bombing now." "Then bomb, let me see how you managed to blow up a sturdy city gate." "Yes, Your Majesty, but the minister has a small request, that is, when the minister raises his hand, he still has to ask His Majesty to open his mouth, preferably with his hands to cover his ears, otherwise the voice is too loud, and so are you." In the latter sentence, Yang Heng said it to the people around Li Er.

"Is it really going to be that loud, that loud?" "Yes, Your Majesty, and the minister also gave such an order to the soldiers below." "Well, well, I'll listen to you."

"Ready." Yang Heng shouted, and a few guards behind him ran out with a few packages, and when they reached the city gate, they began to dig a pit on the edge of the city gate.

"Your Majesty, I have to use my guards for this, the soldiers here have not undergone this kind of training, so there is no way for them to do this job." Yang Heng also had to explain to Li Er why he was using his own guards to do this.

"Ready," the guards in the distance dug the pit and put things into it, and then one of the guards raised his hand and shouted loudly, while the other guards quickly ran back.

"Ignition." Yang Heng also raised his hand, and then waved it down hard, and saw that the guard took out a fire fold from his waist, and then lit a few leads, and then quickly ran to a pit dug on the side in advance.

"Boom," a loud bang rang out as the guard jumped into the pit, and then there was a puff of smoke in front of him, and the gate exploded as the walls on either side fell.

This, how much gunpowder was put in, Yang Heng thought hatefully, this thing was really done, he just asked those Dao Masters to put more gunpowder, but he didn't let them put so much. (To be continued......)