Li Hongru never expected that there would be such a huge casting site in the Chang'an City area.

There are above-ground areas as well as underground areas.

Many skilled craftsmen gather here.

There are people who sew inner nails, there are people who make instruments, there are places to make all kinds of drugs, and there are also strange door props.

This is the supply place for many Yulin Army armors in Chang'an City, and it is also the equipment collection place for members of Dali Temple and other departments.

In each state, there are equipment divisions like Chang'an City, but their sizes are different.

As the capital of the Tang Dynasty, Chang'an City undoubtedly brings together a group of the strongest craftsmen in the world.

Li Hongru raised his head and saw that more than ten meters in the air, two half-human-high instruments were constantly flying around.

It's kind of like a prototype of a helicopter.

But the power of the device seems to rely on gears and belts, and it does not last.

The propeller speed of the bamboo dragonfly decreased, and the rudimentary flying machine gradually fell.

"This is a lift-off, although it is magical, but it has no effect at the moment, and it is difficult to come in handy."

Seeing that Li Hongru was a little interested, Xu Maogong commented.

The Ascending Device is of little use to those with great abilities, but it is difficult to assist intermediate level cultivators, and the ability is extremely embarrassing, plus it is bulky and difficult to carry, so it has not been used in any way so far.

"If you fall into a deep pit, you can still fly out on this aerial vehicle," Wang Fuchou said with a smile.

"I think it's easier to pull a rope!"

Some instruments are really difficult to use in the early stages of creation.

Xu Maogong thought about it for a while and felt that it was difficult to use this kind of equipment in the army.

The Aerial Launcher has some advantages, but compared to the advantages, the flaws of this prop are too serious and need more improvements.

At this time, there was no engine, Li Hongru looked at the lift-off and felt that this kind of product could only rely on manpower at present.

However, everyone's physical fitness and strength are different, and the lifting off is too dangerous, and it is more important to prevent the effects of weather and accidents, which will be a test for designers and experimenters.

Li Hongru also saw a craftsman riding around on a wooden wheelbarrow.

Again, this is an extremely wasteful design.

Unicycles can only run on flat ground, and it is easy to overturn when it encounters bumpy terrain, and if it encounters wetlands, it will sink into the ground.

In the case of horses, there is no market for this kind of unicycle, and it can only be used for entertainment.

"Ga, I'm Wang Dali's bird, the weather is good today, there may be rain at night."

An extremely realistic wooden parrot opened its mouth and began to periodically push the weather for today.

Li Hongru was still quite interested when he saw it, and he didn't understand the principle of vocalization for a while.

"Don't touch Wang Dali's bird!"

Li Hongru had just touched it, and saw that the bird began to flutter its wings and mutter, and immediately took his hand back.

"Your Excellency, this is it."

The leader of the way walked to the workshop where the wooden parrot was located and stopped.

"Wang Dali is the best craftsman in the equipment department, you look at this little wooden bird, its belly can hide a lot of ingenious things."

Si Ye pointed to the workshop, and introduced the wooden bird to everyone, and then raised his hand and slapped the door.

Except for some manufacturers who need to open their doors and assembly lines, many workshops have closed their doors for craftsmen to ponder with peace of mind.

This is the acrobatic scientific research institute of the Tang Dynasty, and it also continues to make military and people's livelihood science and technology continue to move forward.

When Li Hongru was looking at the birds, he saw that the door of the workshop was opened, and a bearded man rushed out angrily.

He just wanted to get angry, but when he saw that the other party was a rare business in the Instrument Division, he suddenly turned to a smiling face.

This is a big man coming, otherwise it would be impossible for Si Ye to lead the way.

"No wonder I feel a little unfamiliar voice, it turns out that Lord He is here, you are looking for me something?" Wang Dali smiled awkwardly.

He looked at Xu Maogong and the others behind He Siye, and felt that these people all had extraordinary temperaments and great backgrounds.

"Lord Xu wants to polish two crystals, you see if you have the ability to meet the requirements."

He Siye got straight into business.

It's just that he didn't know much about the telescope, but at the order of Xu Maogong, he went to get the crystal that met the requirements and led him over.

After he finished speaking, he looked at Xu Maogong.

"What is the focus and focal length, and what is the power of the crystal?"

Xu Maogong asked Li Hongru, he still remembered a little bit of the content at this time, but he didn't understand what was going on.

In his understanding, the crystal must be carved into a certain shape in order to form the basic conditions for making treasure mirrors.

The more transparent the crystal is, the greater the curvature, and the stronger the farsighted effect will be after assembly.

Xu Maogong said the last sentence, and saw Li Hongru go up with a smile to explain to Wang Dali.

"Crystals are difficult to smelt, so they can only be carved with fine carving techniques, polished, and maintained a specific curvature......"

Hearing Li Hongru's request, Wang Dali only felt a pain in his brain.

Even if someone helps, it can only carve the blank, and many details need to be operated by him to achieve the standard.

"Just say if you can do it" He Siye said: "If you can take over this job, this year's task will directly meet the standard, and you can go home three months in advance to hug your mother-in-law." ”

"My mother-in-law is very fierce, and when I go back, she will ask for my money, and I don't want to see her at all" Wang Dali said in a loud voice: "I will be tortured when I go home early." ”

"If you can carve these two crystals as quickly as possible, I can apply to the imperial court for an additional reward of one hundred taels of silver."

Hearing the slightest possibility of Wang Dali's intentions, Xu Maogong's mood suddenly felt much more relaxed.

Wang Dali had some extraneous meanings, but everything was fine, and Xu Maogong immediately responded.

"You rough brain, don't think I don't know your careful thoughts, this is the governor of Bingzhou, you do a good job, your benefits are indispensable, don't complain if you don't do a good job."

The people present are all human spirits, and they don't know the door in Wang Dali's stomach.

After Lord He scolded, Wang Dali suddenly shrank his head.

"I'm just telling the truth, ha~ a hundred taels of silver, hiccup, so much, haha......"

He smiled awkwardly, seeing that Xu Maogong did not blame, and then discussed a few words with Li Hongru in a low voice, which calmed down his excited mind.

"Please be patient, I need to discuss it with this lord before I can do it."

Wang Dali invited Li Hongru, and Li Hongru also stepped into this small workshop.

Many delicate tools suddenly came into view, and Li Hongru even saw a rather primitive pedal angle grinder.

In Wang Dali's workshop, there are all kinds of finely carved props on display.

It is as large as a copper mirror that is not much different from a mirror, and as small as a metal gear with a nut.

In his current wood-based designs, he is remarkable for his ability to carve metal well.

Li Hongru also saw a white jade carved bell on the table, which looked extremely exquisite.

This handicraft ability is much better than his.

After Li Hongru drew the structural drawing, Wang Dali compared it for a while, barely understood the requirements, and then took the tool.

His claws slowly became slender and sharp, and a glimmer of light appeared on the blade of the file.

This is a borrowed demonic power in carving.

The other party has fine black hair on his hands, and the mutation is not too obvious, and Li Hongru doesn't know what kind of demonic power the other party has for a while.

At this point, you need to wait.

However, it is difficult to make large errors in the early stage of crystal carving.

Li Hongru was bored, and he couldn't help but look around.

Touching a few small objects, a trace of information came to him as he reached out and touched a black object.

"When you find the golden stone, do you try to refine and absorb it?"