Speaking of business, Gu Changjun's face became solemn, he stretched out his hand and pointed at a few places near Jincheng on the sand table, and said, "The enemy has been annihilated, they should know that our forces are not as weak as they think, and they should be a little more restrained recently,"

Gu Changjun paused, "However, this is only temporary, no matter whether the other party will attack or not, we all need to think of some ways to deal with it in advance."

"Why don't you get some oil from somewhere else?" Gu Ci asked.

The only thing that is not so safe is that if the wind is not in your favor, it is very likely that you will be burned.

Gu Changjun groaned and nodded, "Yes, but this is just a delaying strategy, after winning once, the other party will definitely have precautions, after all, it is not a long-term plan."

The two fell into silence, and it was really not so easy to come up with a more secure response.

"It's better to ...... Make some equipment to defend the city?"

A voice sounded slowly, Gu Changjun and Gu Ci were both stunned, and looked towards Su Qin.

"Madam, what do you mean by the equipment that defends the city......

The equipment in Gu Ci's impression of defending the city is nothing more than large rolling stones and rolling wood, which can give the besiegers a head-on attack.

However, the footprint of this method is too large, and compared with the effect produced, it is not cost-effective, and it is not so worthwhile.

Su Qin asked Gu Ci to hand over the sleeve arrow he gave him before, and said, "It's probably a relatively large sleeve arrow, and it can be fired when you hold it in your hand, which is more time-saving and labor-saving than ordinary bows and arrows, and it doesn't take up so much space."

As he spoke, Su Qin stretched out his hand and gestured at the size, explaining, "The cast arrow can be completely made of wood for the body of the arrow, and then the arrow is made of fine iron, which is not only powerful, but also instantaneous, which is very convenient. As for the area occupied by the equipment, it doesn't need to be much, as long as you can make enough arrows."

What Su Qin described was the ancient traditional secret weapon of China, Zhuge Liannu.

As the defender of the city, Su Qin felt that it was completely possible to make an enlarged version of Zhuge Liannu, so that the requirements for users could be reduced, and at the same time, it would be easier to build, not so fine.

In this way, isn't it the best equipment to defend the city with a weapon that has a low threshold, great power and instantaneous fire?

"The only drawback may be that the arrows sent out are like spilled water, and if they are not recycled after the war, the cost of materials will be very high." Su Qin said very honestly.

However, Gu Changjun and Gu Ci couldn't listen to what she was saying now, and the eyes of the two big men were as bright as lanterns.

Finally waiting for Su Qin to finish speaking, Gu Changjun finally found an opportunity to speak, and hurriedly asked, "This thing you said, we need it very much, do you know how to make it?" Do you have any drawings?"

When he asked this question, Gu Changjun actually thought that Su Qin should know a certain skilled craftsman who could make it.

Unexpectedly, Su Qin looked calm, shook his head slightly, and said softly, "I don't know who can make it, but I can provide the drawings."

"Huh?"

Gu Changjun and Gu Ci were both stunned.

Gu Changjun subconsciously glanced at Gu Ci, and found that Gu Ci's eyes also showed a look of surprise, and he sighed silently in his heart.

It turned out that Gu Ci didn't know that Su Qin still had this hand!

Indeed, Gu Ci was also very surprised in his heart, his eyes fell on the pair of sleeve arrows she had made for him in Su Qin's hand, and a touch of deep thought flashed in his eyes.

"Well, I can provide it." Su Qin pursed his lips and did not explain.

Seeing her like this, Gu Changjun and Gu Ci knew that she didn't want to say more, so they didn't ask.

Gu Ci remembered the old man who had made a sword for himself before, and offered to try to invite him out of the mountain.

"Reliable? This is what is needed for combat in the army, and the craftsmanship of the people who build it must not be bad, and the mind must not be crooked." Gu Changjun asked more as usual.

Gu Ci nodded, and told the truth, "He should be a skilled craftsman who retired from the Ministry of Industry, I don't know why he chose to live in the town, but his craftsmanship can't be faked."

"The Ministry of Labor retired?"

Gu Changjun has never doubted Gu Ci's eyesight, since he said yes, then it should be.

He nodded and agreed: "Okay, then you can go with Su Qin and ask him to come out of the mountain."

"Okay."

Su Qin and Gu Ci returned to the tent together, and they set off tomorrow to find the old man.

Although Su Qin said that she could provide the drawings, she hadn't started drawing yet, and it would take some time for her to draw the drawings.

Returning to the separate space belonging to the two of them, the question in Gu Ci's heart finally had a chance to ask, he pressed the Hidden Arrow back on his wrist, and asked seemingly casually, "Madam, I haven't had time to ask in detail before I went back and forth, where did this pair of Hidden Arrows come from?" Self-defense is really easy to use, and I think I can buy another pair for you to use."

It's over, I said about Zhuge Repeater today, but I accidentally made Gu Ci remember the old account of the Hidden Arrow!

Hearing Gu Ci's words, Su Qin's scalp was numb, and she could only vaguely fool the past.

"I found that Hidden Arrow in a wooden box when I was collecting medicine in the mountains, along with the drawings of the instrument I just mentioned."

"I see."

Gu Ci listened, his face showed a sudden expression, and he didn't ask more.

Su Qin was afraid that Gu Ci would continue to ask, so he plunged into the process of drawing and painting, and no longer gave Gu Ci a chance to ask.

The matter of Zhuge Lian's crossbow is a coincidence.

So many things Su Qin had exchanged from the system before, but this was the only one, no.

She was fascinated by this dangerous and fascinating secret weapon when she crossed over, and spent a lot of time and effort to learn, and learned how to draw drawings by herself.

It's just that she is limited by the materials, and Su Qin has never made it herself, so she is even more looking forward to what kind of finished products can come out in the end.

What Su Qin didn't notice was that when she was burying her head in drawings, there was a deep gaze behind her, staring at her all the time......

On the second day, the sky was faint, and Su Qin and Gu Ci drove on the road.

This side of the army was watched by Gu Changjun for the time being, and he generously told Su Qin and Gu Ci that he could stay there for a longer time and come back, and he was not in a hurry.

However, be sure to ask the skilled craftsman in the Ministry of Works.

Gu Ci knew that his father was giving him time to get along with Su Qin, and he was moved in his heart.

When they returned to the town and watched Yun Youzhai appear in front of them, the two of them inexplicably felt a little like they were in a different world.