The next morning, Tinghua pulled a truck of materials for Xi Huanyan to inspect, and Xi Huanyan immediately decided to return to Bingshan.

Dan Liu took out a red cloak and put it on her, "Dongjun, the journey is long, let Tinghua send you there. I have made new clothes and bedding, and I will bring them all. In the future, the wind and snow will become more and more severe. You should pay attention to your health."

"Thank you, Aunt Dan." She turned around and stuffed a food box by Jin Tang. Jin Tang was worried, "Dongjun, why don't you bring me with you? You are growing up. The food is very important and you can't be careless."

"It's not that I'm not going back all the time. The food there is also good, just don't worry."

Jin Tang is so resentful, don’t you know that in the eyes of the chef, what other people make are garbage?

When he thought of Dongjun eating garbage every day, he felt so heartbroken that he couldn't breathe.

Xi Huanyan's left brain material and right brain research, and couldn't wait to say goodbye to a few people, urging Tinghua to rush on his way.

When she returned to Bingshan, she locked herself up with a bunch of materials and tools.

The snow fell one after another outside, and the whiteness covered the traces of war. The harsh environment locked people in the city, and the border was finally quiet.

When the first heavy snowfall was falling, Xi Huanyan made a lens with a clear vision. When the second heavy snowfall was falling, she successfully extracted the perspective technique from the mirage, integrated it with the lens, and made a single-tube perspective telescope, which can see through up to 1,000 meters.

Considering the actual combat, it is obviously not realistic to hold a telescope to find an opponent among obstacles. After several modifications to the lens, she made thin lenses that did not affect her field of view, which were fixed with a bracket and placed on the bridge of her nose. However, because it was a single mirror, there was no hyperopic effect, and at the same time, she lost the superposition effect of the single-tube telescope bi-lens perspective technique, and could only see through obstacles within 500 meters.

She named it perspective glasses, debugged it to the most suitable form to wear, and went out to try it with it.

It does not require consuming one's own spiritual sense and does not affect the battle. The material cost is as low as one gold coin per pair, so it should be considered successful.

But it is not that simple to make it for people to use.

Xi Huanyan communicated with the Grand Secretary of Feidu and asked him to make an idea.

"Teacher, its main technique is the perspective technique of Mirage. I mean this. One is to contribute all the techniques and production methods used to Bingshan in the name of you and me to exchange rewards and merit points. Bingshan determines its use. If the teacher does not want to spread the perspective technique, I will only hand in the production method and then take the task of making perspective telescopes and perspective glasses by myself."

"Your idea is good, but don't forget what the teacher is doing. Believe me, with the establishment of the Divine Thought Branch, there will be more and more source masters, martial artists, and even ordinary people who know divine thoughts. The perspective brought by divine thoughts is no longer strange. In less than five years, the perspective telescope and glasses will become useless unless its vision range can break through the limits of ordinary divine thoughts."

"What does the teacher mean?"

"I have no intention of popularizing the new divine spiritual practice method to the Eastern Region to use its greatest value and make money from other Daozhous." Feidu Grand Secretary Lang smiled, "Dongjun, think about it carefully. I have the full right to you in terms of perspective. I believe you can make a suitable decision."

Xi Huanyan pinched the communication, folded her hands behind her head, lay down on her back, and looked at the top of the dark stone chamber and thought about it.

She was originally a smart person. Once she was guided by the Grand Secretary of Feidu, the blueprint in her mind gradually took shape.

This time, she should not cooperate with Bingshan, but with Chucao.

With thought, Xi Huanyan took the thing and returned to the Xifeng Ji Mansion of Fenghe Mountains in the wind and snow.

The bookkeeper welcomed him warmly, "Why is Dongjun here? Let's go to the small hall to sit there. Even Qiao, why don't you go and serve pastries and milk? It's going to be hot!"

"Yes, come right away." A small official left.

As soon as Xi Huanyan sat down, she didn't talk much nonsense and showed the usage of perspective telescopes and glasses to Bu Cao, and asked, "Does Lord Bu Cao think they can be used in the daily operations of law enforcement teams such as Zhuo Ri Mansion and the City Guard?"

Chucao tried it several times and nodded, "Yes, there are many martial arts in these teams, but there are quite a few people who are good at using divine thoughts. Even if there are, they want to sense abnormal movements through surrounding obstacles, which will consume a lot of money. If everyone can hold a glasses, they will be extremely convenient when pursuing prisoners, searching suspicious people, and deploying troops. Dongjun cannot just give me some appreciation. You might as well tell me the purpose."

"I heard from me that the whole story is not complicated to make these two things. Once you take them out, you can probably copy them as it is, but we are the first to create them. If you can seize the opportunity, you can solve the warehouse's weakness."

After saying that, she expressed her purpose, "Does the Book and Cao have any channels to make them a regular auxiliary tool for all law enforcement teams in the East Region? If so, my Fu Shop can cooperate with the Ji Mansion you are in charge, and the profit will be 64 cents."

Chu Cao picked up the tea he had just brought up and took a sip. When he entered his mouth, he found that he had mistakenly taken the milk for Dongjun. The sweet smell made him smash the mouth, and he quickly asked Xiaoguan to bring another cup.

"Dongjun's idea is bold and big attempt, let me think about it."

As he thought, he asked, “How much is it?”

"The cost of materials is one gold coin for each, and the labor cost is... To be honest, the main technique is temporarily exclusive, and each counts twenty gold coins."

Zhu Cao slapped his thigh, "The price can be priced at 1,000 gold coins. The main technique is perspective? It is true that those who think of the divine mind can see through, but it is another matter to use perspective into techniques and integrate them into objects. At least there are very few things in perspective on the market, and Zhurifu is particularly oily and water, so you can afford to pay. One thousand gold coins are nothing to them."

Xi Huanyan was amazed. The price was decided by the slightest point. After being taught, the greatest value must be its rareness.

But Chu Cao said, "I have set it very low. This price is not enough for the divine masters to study perspective and lenses to copy them. Moreover, if I, the Tongzhou, sell them to the Eastern Regional Law Enforcement Team first, and others want to interfere in the division of the soup, they have to consider the consequences of offending the Duke."

"It's reasonable." Xi Huanyan wanted a definite answer, "Is there a way for the book owner to get them on the list of regular auxiliary equipment for the law enforcement team?"

"As long as it is useful enough, are you still afraid that others will not want it?" Zhu Cao Dao, "First equip the law enforcement team in Tongzhou, and I will contact other Daozhous."

"This is great. You can count a number and then set a time to deliver the goods. I only need the cost price in Tongzhou."

"How can you be so embarrassed?"

The bucao refused with a slight slight refusal and agreed with a smile on his face.

"Mr. Dong, there is only one thing. I have to explain clearly that this perspective cannot flow into the people."

"I understand that it will damage privacy after all. If you have one, you don't know how many disputes it will cause. Correspondingly, there must be rules for the law enforcement team. You cannot use it at other times except during the mission."
Chapter completed!