Liu Ruyan was secretly surprised, and glanced at the drawings in front of him to a booklet placed next to him, "Examination Records".

This craft work has detailed specifications for the shape of vehicles and weapons, and the book uses "rules" and "moments" as the basic units for data calculation.

This set of calculations is a meticulous work, and there can be no mistakes.

On the other hand, Gong Yiyu is very talented, even if it is the first time to build a bed crossbow, he is also at ease.

At this moment he had calculated the dorsal curvature of the three longbows and began to build them.

"Little soldier, take ten silkworm cocoons and twist them for me as a bowstring." He commanded without lifting his head.

For assisting Gong Yu, she did not dare to slack off.

Liu Ruyan picked out ten huge and full cocoons from the basket, processed the cocoons, picked out the silk threads one by one, and twisted the strings.

Liu Ruyan handed the twisted bowstring to Gong Yu.

Gong Yuyu took it with his hand, screwed it in the bow, tried the toughness, and praised it: "Your craftsmanship is exquisite." ”

At that time, the young man sat against the window, his face lined with the misty twilight clouds outside the window, and he smiled and passed by, just like the sunset on the horizon, bright and dazzling.

The system prompt sounded coldly: "The plot character loses to Yu, and the hatred value is -20." ”

So when Dong Qingxian returned to the tent to rest, he saw such a scene.

Gong Yuyu polished the crossbow and bow, rigorously and seriously.

Liu Ruyan twisted silk as a string, with tacit understanding.

In just one day, these two people are actually weird...... Harmonious?

Dong Qingxian rubbed his eyes, making sure that he was not dazzled.

"You ...... this"

Liu Ruyan didn't raise his head, and continued to peel off the cocoon in his hand, "The little brother has recovered, and he wants to make a bed crossbow as soon as possible." ”

"It's good to be fine." Dong Qingxian looked at the timber and parts that occupied most of the place, and in the middle of it, the siege bed crossbow had begun to take shape.

Dong Qingxian rolled up his sleeves, a little eager to try: "It's better to come and help with Qingxian." ”

Gong Yuyu took the time to glare at him. How can these mud-legged men do such a delicate job except for brute strength?

But when the words came to his lips, they became: "Brother should rest after a tired day, how dare you bother you with such rough work." ”

"No trouble, no trouble at all." Dong Qingxian took the drawing, and put the ruler on the wood to compare, he moved skillfully, popped out a straight line with an ink fountain, and asked without raising his head, "Ah Yu, do you think it's like this?" ”

Ah Yu?

Gong Yuyu's brows twitched.

Hey, dude, am I familiar with you, Ah Yu is what you can call casually?

Dong Qingxian was completely immersed in the fun of carpentry, he picked up the saw in style, and his eyebrows and eyes were gentle: "Back then, I built a wooden house in Shudi. ”

Gong Yiyu was quite surprised, but he didn't expect that there was a hidden dragon and a crouching tiger in this camp, and it was really unseemly.

Liu Ruyan was also surprised, and she couldn't see that Dong Qingxian, who was proficient in music, still had this skill.

She smiled and asked, "You built the house on the mountain?" ”

Dong Qingxian began to saw wood, "No, I built a pigeon loft. ”

Liu Ruyan sneered: "The pigeon loft must also be ingenious......

"Yan'er praised it." He smiled and smiled, holding a pen in his hand and waving ink between the papers, drawing a boxy pigeon loft with a round hole in the middle.

"I think it took months to cut down two birch trees in order to make a pigeon loft."

Liu Ruyan: "......"

Gong Yuyu: "......"

If it weren't for his serious expression, Liu Ruyan would definitely think that he was joking.

Just this kind of gadget, and it costs two birches?

I'm afraid he didn't build a pigeon loft, but a pagoda through heaven!

Suddenly, a magnificent tall building conjured up in her heart.

Until Dong Qingxian sawed the first piece of wood.

He let out an "oops" and stared at the broken wood with great regret.

Fang Cai unconsciously injected a bit of true qi, so that the plate collapsed, and the edges showed irregular openings.

It doesn't seem to work.

In this regard, Dong Qingxian seems to have long been commonplace.

He picked out the right wood, picked up the hacksaw and got to work.

Simply didn't make any mistakes from beginning to end this time, Liu Ruyan thought secretly.

But as it turned out, she was still too naïve.

Every piece of wood in Gongyu's hands can be said to be the best use, and he hacksaws down, fast and steady, smooth and vertical, just like cutting tofu.

On the other hand, Dong Qingxian, Xu is used to playing the huqin, as soon as this hacksaw arrives in his hand, he moves the bow and kneades the strings, and the sawtooth moves up and down, whirling between the wooden boards.

In the end, the sawn section is the same as that of a dog, and it cannot be made into a mortise and tenon structure.

Dong Qingxian realized this and went to pick wood again.

The corners of Liu Ruyan's mouth twitched, if he continued like this, no matter how many materials he had, it would not be enough for him to squander!!

Looks like we'll have to find a way to divert his interest.

"Erhei—" she opened her mouth to call.

Dong Qingxian, who was pretending to be Zhang Erhei, subconsciously turned his face sideways to listen to what she was going to say next.

"Yesterday, Dr. Gou dug up a honeycomb in the ravine and brought a lot of osmanthus nectar back, and now he should have a little left there, if he goes late, he may finish eating......"

When Dong Qingxian heard the words "osmanthus nectar", his eyes lit up.

Then, before she finished speaking, Dong Qingxian turned around and picked up a clay pot and hurried out.

Gong Yuyu hadn't reacted yet: "This kid is in a hurry, where did he go?" ”

"Where else can I go?" Liu Ruyan finished twisting the silk thread, "Like you, I'm thinking about that bit of honey." ”

Dong Qingxian, as a Shu person, is paranoid about sweetness to the point of madness!

It is said that the Shu people eat and like honey.

Dong Qingxian usually eats tofu and milk, and likes to soak some honey, and he even has to dip gluten and meat in honey for seasoning.

This kind of food custom is really unbearable for northerners!!

So all the way south, whenever she saw the "Sichuan Restaurant", Liu Ruyan rode her horse and galloped, trying not to go to the store to eat the sweet ancient Sichuan dishes.

Without Dong Qingxian's delay, the speed of building a bed crossbow was much faster.

In mid-September, Gong Yuyu finally built the first "three-bow bed crossbow".

Xie Feng heard that the bed crossbow had been built, and he asked the soldiers to push the crossbow machine to the mountain rock for trial.

On the day of the trial, Song Jun and a group of sailors came to the back mountain early.

Dong Qingxian and Liu Ruyan, as pro-soldiers, were naturally also present.

This bed crossbow is more sophisticated than previous ballistas. It uses the combined force of three longbows to fire arrows, and is equipped with pulleys in orbit, which greatly saves the crossbowmen's energy, but is even more powerful than before.

In addition, a huge arrow was placed in the middle of the crossbow of the bed, which was five inches thick, and flew out like a javelin, which could be firmly driven into the city wall.

The left and right arrows are each put three slightly smaller arrows, seven arrows are fired together, and the city fortress is all destroyed, and the building also falls.

The most wonderful thing is that the bed crossbow can also fire tread arrows, several bed crossbows are fired at the same time, rows of tread arrows pierce into the city wall, and the siege soldiers can climb up and climb over the city wall without a ladder.

As for the next step, it is necessary to check the range of the bed crossbow.

Gong Yuyu was instructed to have his soldiers load their special arrows, while the rest of the crossbowmen stood on their sides and stood near the winch at any time.

Dong Qingxian looked at the rarity, and moved forward a few more points, he looked at the mountain rock opposite, at least five hundred steps away from the bed crossbow.

But Gong Yuyu was not satisfied, and he ordered again: "Three hundred steps back!" ”