"Isn't the convex lens enlarged?" Tao Qini picked up the glass lenses with a sizeable palm made by the way and said.

"What are you doing this? You shouldn't see the water Gu if you enlarge it!" Yao Changsheng tried scooping the river water and found nothing, "I did so much at once."

"By the way, there are only ten concave and bumps." Tao Qini packed these treasures made by herself, put them in the bag, and urged him as she watched him, "Let's go and do it for you to see, and I can't let you go." She pushed him directly.

"Then I'll wait." Yao Changsheng took her hand and said, "Let's go!" The people who told Liulichang to watch the venue, and they left Liulichang.

The two of them rolled over the horse and rode their horses on the quiet and sparse streets.

When they arrived at the Jinling Prince's Mansion, they turned over and got off the horse and handed the reins to the guard, and stepped into the palace from the side door.

When the two walked towards the library and passed through the bamboo forest, Tao Qini cut some bamboos.

Yao Changsheng didn't ask any more, anyway, he soon knew why he did this.

The two entered the library. Tao Qini put the bag on the desk, took out the concave lens, took the bamboo and gestured the size of the lens, and found a suitable one.

He held the bamboo with his own overlord knife, cut it down, put the lens on it, and handed it to Yao Changsheng and said, "Go to play by yourself!"

Yao Changsheng looked at her rough slut, fiddled with her for a while, and handed the bamboo tube to himself, "What do you mean?"

"Look outside through it!" Tao Qini's eyes as clear as the moon, looking at the bamboo pipes he placed in his hands.

Yao Changsheng raised the bamboo tube with confusion and looked at the black tube mouth.

"Go out and see, you can't see it here. When you go to the sky, it's best to call you Jiujiu. You will have a surprise discovery." Tao Qini looked at him with her eyebrows and eyes and said.

"I'm just a secret and see what you're selling." Yao Changsheng looked at her with a doting smile and raised his foot out of the library.

Yao Changsheng stood in the middle of the courtyard and whistled, raised his eyes to look at the blue sky, and found black spots, "Jiujiu." He picked up the bamboo tube and pointed it at Jiujiu, and suddenly opened his eyes wide. "This..." Jiujiu seemed to be in front of him, and put down the bamboo tube. It was obvious that Jiujiu was still far away from him!

Continuing to observe other objects through the bamboo tube, Yao Changsheng said to himself with curved eyebrows, "It was indeed a surprise discovery." His eyes were ABC Novel Network, but unfortunately he could not see anything.

"What is Changsheng doing?" Chu Jiu stepped over the moon gate and looked around with a bamboo tube. The chirping beside him flew around with his wings.

"Master!" Yao Changsheng lowered the bamboo tube in his hand and bowed with his fists.

"What are you doing with this?" Chu Jiu asked curiously with the bamboo tube in his hand.

"Please take a look." Yao Changsheng presented the bamboo tube to him with both hands, and looked at Jijiu who fell on the tree branch and said, "Jijiu flew higher."

He doesn't even have a golden eagle-eyed bird, so he brushes... and doesn't miss his face.

"This chirp is so proud." Chu Jiu said with a smile at it.

"Please, I'll feed you something delicious later." Yao Changsheng looked at Jiujiu gently and asked.

"Why did you let Jiujiu fly!" Chu Jiu looked at him in confusion and guessed with certainty, "Does it have anything to do with this bamboo tube?"

"It's more obvious to see if you Jiujiu." Yao Changsheng tilted his head slightly and looked at him beside him, looking up at Jiujiu and continued to ask, "I'll do my best."

Jiujiu turned his head and looked at Yao Changsheng, and flew up with his wings.

"Oh!" Yao Changsheng was really convinced of it, turned around and looked at Chu Jiu, "Master, take this bamboo tube and look at Jijiu quickly."

"Oh oh!" Chu Jiu took the bamboo tube in his hand and looked at Jijiu, "Ah..." He said in disbelief, "This Jijiu is clearly flying far away, why am I watching it be so close!" He took off the bamboo tube and looked at the sky. Jijiu had turned into a black spot in his eyes.

"Why?" Chu Jiu looked at him with a dark look, then looked at the bamboo tube and discovered the mystery, "What is this?"

"Glass pieces." Yao Changsheng looked at him with a smile and said, "Master, let's sit down and talk."

The two sat on the bamboo chairs in the yard, and Chu Jiu couldn't wait to ask, "Tell me! Because of these glass pieces, what you see is different."

"Yes!" Yao Changsheng looked at his deep and clear eyes and said, "How do I explain to you! When people get old, their eyes will be blurred. When they use this glass sheet to look at the font, they will enlarge it. I think the elders in the family spent a thousand taels of silver to get a pair."

"Thousands of... Thousands of silver." Chu Jiu's chin was almost shocked, and he looked at the glass piece in his hand, "That's it?"

"Of course it's not it. The glass sheets I mentioned on the eyes were polished with natural crystals, so of course it's ridiculously expensive." Yao Changsheng pointed to the glass sheets in his hand and looked at him, "This is simple. It requires special materials and lime and alkali, which are worth melting after high temperature."

"I can't understand a word of what you said." Chu Jiu looked at him in confusion and said.

Yao Changsheng looked at him and said, "Then I said quicklime, you should know!"

"I know, build a house and paint a white wall." Chu Jiu nodded clearly and said, "It's all lime."

"Limestone can be directly burned into quicklime. Quicklime absorbs moisture or adds water to become ripe lime." Yao Changsheng looked at him with clear amber eyes and said, "This iron smelting uses limestone as flux. Steel smelting uses quicklime as slag material to remove harmful impurities." Duowen said again, "This is what I learned from the blacksmith when smelting iron."

"Let me make sense!" Chu Jiu pondered for a while, digested what he heard, and suddenly looked up at him and said, "I understand this way, it is the natural crystal that is expensive and expensive, which can be easily burned. In this way, the price will be reduced...

"Yes! The firing is like porcelain burning with unique soil." Yao Changsheng looked at him with a funny look and said, "But this quartz also needs to be searched for coal mines or iron mines."

"I don't want to find a place to log again!" Chu Jiu said with his eyes wide open and he looked at him with a round look.

"No need for this. I asked about the burning glass field. It's in Fengyang, which means there is a quartz mine in your hometown." Yao Changsheng looked at him with a smile on his lips and said.

"Wait a minute, I will tell you about such a secret matter." Chu Jiu looked at him in disbelief and said.

"Shut... It's not as easy as drinking water, eating!" Yao Changsheng said proudly, tilting his chin slightly.

"Yes, yes, we can live forever." Chu Jiu looked at him and shook his head and laughed, "But why didn't I know there is a quartz mine in my hometown?"

"That master is honest, don't be angry!" Yao Changsheng looked at him embarrassedly and said.

"Okay, I understand. Even if the quartz mine is placed in front of me, I don't know it." Chu Jiu's eyes turned and looked at him gently, "But what can this do?" The index finger pointed at the bamboo pipe in his hand. "This is the best thing to use in detecting enemy situations. It's too clear to see it. It's not easy to expose yourself from afar." He said again when he thought about it, "You can also see through other people's ambush." ​​He bounced the bamboo pipe, "This is indeed a good thing for us."

"It can be used on sailing and on boats." Yao Changsheng said to him with a smile on his face.

"Yes!" Chu Jiu was stunned when he heard this, then nodded with a smile.

"Does the Lord know the lanterns of the Glazed Palace?" Yao Changsheng asked with his glass bead-like eyes.

"I know, I have seen it in the book, it is much better than a paper lantern, and it is windproof." Chu Jiu suddenly opened his eyes wide and said, then shook his head again, touching the glass sheet and said, "It seems not flat."

"It can be made into flat and transparent." Yao Changsheng said with a smile at him and pointed to the window, "The window on the master is covered with paper, and the house is dim and dark."

Chu Jiu followed his fingers to the window, closed his eyes and said, "Changsheng, please calm me down." He stuffed it in, so he had to digest and digest it himself.

Yao Changsheng laughed without saying a word when he heard this, and watched Jiji fly down from the sky and land on the bamboo table.

"This is another money-making business. Not to mention other things, you can make a lot of money on the windows alone." Chu Jiu happily patted his shoulder, "When the Jinling City is restored, we will burn the glass and replace all the windows of the royal palace first." Suddenly, he said excitedly, "The money earned in this way can build a big ship!" He was happy like a child.

"Yeah!" Yao Changsheng nodded with a smile.

"Hey! You go to someone else's Liuli Field and you're not stealing it!" Chu Jiu suddenly looked at him nervously and said.

Yao Changsheng looked at him in surprise and said, "No, no, we rented it, we fiddled with it ourselves, useless craftsmen."

"The headache now is that if the plague is not eliminated, nothing can be done. This man is powerless and unable to get up." Chu Jiu's head and two big ones suddenly diluted the happy event a lot.

"Is there no news from Gao Ming yet?" Yao Changsheng asked with concern as he looked at him frowning.

"No." Chu Jiu shook his head slightly with his chin tense, "I'll let Tianyou guard the riverside!" He blinked and said, "Where are brothers and sisters? You two are so strong that you are always weighing each other, so why didn't you see her?"

"It's in the house!" Yao Changsheng looked at ABC Novel Network.

Tao Qini raised her voice and shouted, "Honey, my husband."

"Here, come." Yao Changsheng stood up and said, lowering his eyes to Chu Jiu and tilting his head, "Master, let's go in and take a look."

The two of them quickly walked into the library. Yao Changsheng stared at her with his eyes and said, "How are you doing it?"

"Come and see, the effect is good, you can actually see it." Tao Qini said with a smile, looking at Chu Jiu who came in with her, holding her fists and saluting, "Master."

"What is this?" Chu Jiu said at the strange thing in front of her.

"You can see things that we cannot see with our naked eyes." Tao Qini pointed to the bamboo pipe that was obviously much thinner, "Look!"

Yao Changsheng walked over quickly, looked over, and looked at the slow and small insect inside, "What is this?"

"This is the culprit of the raging belly disease, water Gu!" Tao Qini stared at him and said.

"I'll tell you my god." Yao Changsheng was so shocked that his eyes almost glared out of the window.

"Changsheng, let me see what the culprit looks like." Chu Jiu was so anxious!

Yao Changsheng stood up and made way out, "Master, please!"

Chu Jiu imitated him and looked over, "He looks so ugly." After seeing it, there was nothing good to look at.

Chu Jiu straightened his body and took two steps back to look at them and said, "Why are you trying hard to do this? Just to see the culprit."

"Master, let's sit down and talk." Yao Changsheng pointed to the ring chairs on both sides and said.

Chu Jiu took two steps and sat in the ring chair and watched them say, "Sit!"

Yao Changsheng and Tao Qini sat down.

Tao Qini looked at Chu Jiu with clear eyes and said, "Master, I said that it is not difficult to treat a big belly disease. As long as there are enough medicinal materials, it can be solved quickly. The key is prevention and treatment. Prevention and treatment require people and mobilize the people inside and outside the city. However, it is unreasonable to say it, and we must see it as the truth."

"Isn't it enough for Young Marshal Gu to bring 100,000 troops here?" Chu Jiu raised his eyebrows and said to him and said.

"Master, God bless them these days, the investigation results should be made!" Yao Changsheng looked at him and asked.

"There are five prefectures and eight prefectures, thirty-three counties." Chu Jiu closed his eyes and looked at them, "These 100,000 people are not enough to see, and they really need to be united." He nodded and said, "I understand."

"When the medicinal materials come, they will start to save the people in the city." Chu Jiu said as he patted the armrest of the ring chair.

"Lord, Lord." Li Daotong's voice came from the yard.

"You guys are busy! I'll go out and take a look." Chu Jiu stood up and said.

Yao Changsheng and Tao Qini bowed and watched him leave.

"Mr. Li." Chu Jiu stepped out of the library and looked at him anxiously.
To be continued...