At the beginning, his wife came to him, and he became rich by selling kidney treasures.

"You think too much!" Ren Hao glanced at him.

"What do you mean?" Xu Qing was stunned.

Although Ren Hao spoke very rudely, Xu Qing just liked this way of getting along with him.

There was no other reason. When he was in the capital, except for those few children of officials, few people dared to speak to him like this. Almost everyone spoke in a flattering manner.

When he arrived at the border, he was second only to the emperor and no one dared to disrespect him except his father.

This resulted in Xu Qing having very few friends, and he instead preferred Ren Hao's casual attitude.

Ren Hao said calmly: "The number has increased, but the accuracy has weakened."

"The tail feathers of this kind of arrow are very small, and there is not enough wind resistance. It is fine at close range, but once it is far away, it will deviate from the trajectory, and then it will become like shooting the horse first before shooting the man."

Hearing Ren Hao's words, Xu Qing nodded. He naturally understood this principle.

"Actually, this is pretty good. If we can't attack from a distance, we can use it for defense. With this thing, it won't be so easy for the enemy to attack the city."

Xu Qing's face was full of excitement. If it was used in defending the city, the soldiers would spend less time reloading arrows. As long as there were enough arrows, defending the city would not be difficult at all!

"That may not be the case." Ren Hao shook his head.

When he entered the house, Ren Hao took out paper and started designing.

He wanted to make something like a pulley to reduce the pulling force.

The specific effect is definitely inferior. Although it cannot reach the level of some labor-saving levers in previous lives, it can definitely save people effort!

Anyone who has studied junior high school physics should know that pulleys can save effort, but the distance needs to be increased.

Ren Hao is just an ordinary college student after all, so the designing for him wouldn't be too difficult.

After a while, Ren Hao finished the sketch.

Xu Qing stood behind, looking on in confusion.

"What is this?" Xu Qing asked.

"It looks like a wheel. Are you going to install this on your crossbow? What's the use of this thing? Your crossbow is not big to begin with. Wouldn't it be superfluous to install this on it? It looks pretty good, but why did you install this..."

"I think if you don't say anything, I can lend it to you when I'm done." Ren Hao was a little helpless. Why is this kid so chatty?

Xu Qing had no choice but to shut up after hearing that.

After coming out of the door, Ren Hao continued to work.

For a whole afternoon, Ren Hao was concentrating on the production. Xu Qing did not mind and watched Ren Hao's movements attentively.

It was not until the evening that Ren Hao completed the production of the improved compound crossbow.

The crossbow body is much longer than before, and in order to increase the pulling distance, the bow body is also lengthened.

At this moment, the compound crossbow looks more than twice as large as an ordinary hand crossbow.

But it's not too heavy, and it's not too difficult to lift.

Pulling the bowstring, Ren Hao clearly felt that the pulling force at this moment was more than half less than before.

Don't underestimate this half.

The human body has a recovery rate.

For example, if a person does pull-ups, he or she will reach the limit after doing a dozen or so, and it will be difficult to pull up again in a short period of time.

But if this person lost half his weight, not only could he do thirty-four in a row, but he would only need a short time to regain the strength to do it again.

This compound crossbow is different from the compound bows of previous lives. The compound bow does not save effort when pulling, but it can save a lot of effort when keeping it taut.

The hand crossbow itself is a snap-on design and does not require manual maintenance, so the compound crossbow made by Ren Hao is just an addition of a labor-saving roller skate group.

Aiming at the poplar tree outside the door, Ren Hao pulled the trigger.

Whoosh!

boom!

The arrow exploded on the tree trunk and went straight in almost halfway.

"Let me try!" Xu Qing, who had long been unable to contain himself, snatched the compound crossbow and stringed it like Ren Hao.

In just a moment, his expression changed!

This level of pulling force can be pulled not only by archers but also by ordinary people!

Although the distance was a bit long, after cocking the gun, Xu Qing pulled the trigger.

As the arrow shot off a twig, Xu Qing was stunned, his mouth opened so wide that a steamed bun could be stuffed in it.

"What a powerful crossbow!" Xu Qing took a breath.

After many years of military career, he knew the value of this bow very well!

If there were a thousand people holding such crossbows, they could shoot out tens of thousands of crossbow arrows in just a few breaths!

What is this concept?

If there is a cavalry of 3,000 men rushing over, at least 1,500 of them will be knocked down with just one volley!

Another five hundred were trampled into meat paste by the people behind them, and the remaining fifteen hundred were lambs to be slaughtered!

"It's good enough as long as it's powerful." Ren Hao took the compound crossbow and nodded with satisfaction.

From now on, I have the power to protect myself.

Xu Qing looked at Ren Hao with strange eyes, and suddenly said: "Brother Ren, can you give me a crossbow like this?"

"Give it to you? No." Ren Hao shook his head.

This is something that can guarantee my life and property, how can I just give it to someone else? It's already very generous of me to lend it to Xu Qing to play with.

"But..." Xu Qing opened his mouth to say something, but saw that Ren Hao had already entered the room.

Looking at Ren Hao's back, Xu Qing couldn't help licking his lips.

"I must get it!"

……

The next morning, when Ren Hao just finished washing up and came to the yard, he saw two people standing at the door waiting for him.

A young man in black clothes smiled at him.

A beautiful woman in light blue clothes with a frosty face.

"Brother Ren, I'm here to bother you again." Xu Qing said with a smile.

Ren Hao looked at Xu Qing, then at Xu Yating, walked to the door and opened it.

"come in!"

Sitting on a chair in the middle of the yard, Ren Hao looked at the two of them calmly and said indifferently: "Xu Qing, Xu Yating, you are brother and sister, right?"

"That's right!"

"Why do you always come to my place? What's your purpose?" Ren Hao asked. "Why don't you tell me? I'm not a difficult person to talk to."

Ren Hao didn't need to ask specifically about the fact that Xu Qing and Xu Yating were living in Ren Tiesan's house, as it had already spread throughout the village.

After all, the sudden appearance of a few strangers in such a small village with only a few hairy people would definitely attract attention.

Ren Hao even knew that Xu Qing and Xu Yating were relatives of Ren Tiesan's wife.

So he just came straight to the point. After all, he did sleep in the same bed with Xu Yating that day. Although it was not his fault, Ren Hao did not want to evade responsibility because of this matter.

"Hehehe..." Xu Qing laughed and said, "Brother Ren, I already know about Yating's situation, so I came here this time to talk to you."

"What do you want? A compound crossbow?" Ren Hao raised his eyebrows.

If Xu Qing wanted a compound crossbow, he would not be unwilling to give it up and would just make another one himself.

"No, no, no..." Xu Qing shook his head and suddenly said, "Brother Ren, what do you think of my sister?"