PFC Chapter 471: Junior sister became a savage.
Chapter 471: Junior sister became a savage.
Jasmine made a face and smiled, "Uncle guessed right, it was Gongsun Shangfei who sent a letter of apology."
"Really? Let me take a look."
Ye Kun was also happy and took the letter to read it.
The letters were sent by carrier pigeons, one was from Mianzhu prefect Guo Ping, and the other was from Gongsun Shangfei.
Guo Ping said that Gongsun Shangfei had already surrendered his military power and was on his way to Xuchang to accept punishment. In the letter, Guo Ping did not say a word and did not mention any of his own merits.
In Gongsun Shangfei's letter, he expressed his sincere attitude of admitting his guilt and said that he would come to Xuchang to plead guilty and leave it to Ye Kun to deal with him at his discretion.
Ye Kun thought about it and wrote back to Sang Buzhi, asking Guo Ping to stay in Xiqiang and serve as the governor of Xiqiang, take charge of military and political affairs, continue to consolidate the territory, and prepare to control the entire Xiqiang.
As for Gongsun Shangfei, let's talk about it after he arrives in Xuchang.
Jasmine said, "Uncle, if Gongsun Shangfei admits his mistake, the West will be at peace, right?"
Ye Kun shook his head:
"Western Qiang is too high in altitude, cold and oxygen-deficient, with strong ultraviolet rays, so it is not suitable for human habitation. It is difficult for us to control Western Qiang. At present, we have only controlled half of Western Qiang, and there is still a large area that is difficult to penetrate deeply."
On the Tibetan Plateau, the Dading Kingdom originally had a Protectorate, but it did not mean complete control.
Later, the imperial court became weak and lost all control over Western Qiang.
Ye Kun’s goal is to implement the county system in Xiqiang and the entire Tibetan-Qinghai Plateau.
Only by fully implementing the county system can you gain complete control over the region.
Jasmine had the same idea as Jiang Yourong and asked, "Uncle, what do we need such a large area for? Zhongyuan, Yizhou, and Jiangdong all have all kinds of products. We don't lack anything."
"This is a man's game, you wouldn't understand."
Ye Kun smiled slightly.
It is indeed useless to occupy Western Qiang and the Tibetan-Qinghai Plateau now.
However, strengthening integration and sinicization will have a different impact on future generations.
Li Shimin of the Tang Dynasty was later threatened by the Western Qiang Tubo, so he married his princess to Songtsen Gampo. If Li Shimin had the ability to conquer this land, he probably wouldn't have married his daughter to him, right?
After replying to the letter, Ye Kun took Jasmine to the Science and Technology City to continue tackling scientific research problems.
Sun Yi ran over with a glass in his hand, grinning, "Brother, guess what this is?"
Damn, what day is today? You make me guess?
Ye Kun looked at the light grey cup and shook his head, "I can't guess."
"It's lead. A combination of lead, mercury, and tin."
Sun Yi said proudly: "You said before that by applying lead, mercury, silver and tin compounds on glass, you can make a glass mirror. I have finally made some progress in my research recently!"
Ye Kun was shocked: "You got the glass mirror out?"
"Almost done." Sun Yi grinned, took out a small piece of glass from his bag and handed it to Ye Kun to look at.
One side of the glass is coated with tin amalgam.
It can already illuminate a blurry figure, but it's not bright enough and the image is distorted.
"Junior brother, you are amazing!"
Ye Kun was overjoyed and said, "This is the glass mirror I was talking about. But the craftsmanship is still a long way to go. You keep thinking about it and experimenting with the formula of the coating layer. You should be able to make a real glass mirror soon!"
If you can make a glass mirror, you can make a lot of money!
And if we can make a mirror, it is possible to make a thermos.
Sun Yi chuckled and dragged Ye Kun to see the glass mirror laboratory.
The research on glass mirrors has also been launched, so there is a separate laboratory.
There are more than a dozen researchers, as well as collaborators from other disciplines.
Sun Yi said: "According to the current experiments, tin amalgam is the best coating material. This tin amalgam is also used to grind bronze mirrors. The technical difficulty lies in applying the tin amalgam to the glass..."
The so-called tin amalgam is a fusion of metallic tin and mercury.
The gilding technique was already used in the Shang and Zhou dynasties.
The so-called gilding uses a material that is a fusion of gold and mercury.
Craftsmen first make gold foil, then pour mercury on it to blend it in. They then use a filter cloth to squeeze out the excess mercury to get something like a paste.
Spread this batter on copper objects and bake them at high temperature. The mercury evaporates, but the gold remains and combines with the surface of the copper or silver objects to form gilding.
The difficulty that Sun Yi mentioned is smearing.
Because the bond between glass and tin amalgam is not good and is not strong.
Ye Kun thought for a moment and said, "Will hot-dip coating work? When the glass is just out of the furnace and the temperature is still very high, can we apply the coating on it and then heat it up to evaporate the mercury? Will that work?"
“I tried, but it didn’t work.”
Sun Yi took out another glass mirror and showed it to Ye Kun.
The coating of this mirror is full of holes, like a sieve.
"The hot-dip method is correct. The failure is still due to material problems."
Ye Kun pondered for a while and instructed: "When you make the tin amalgam, add different proportions of silver powder and give it a try."
I seem to remember that silver was added to the coating layer of the glass mirror at the beginning.
Sun Yi asked, "Silver foil, or silver powder? We do have this stuff."
"You can try silver foil and silver powder. I personally think silver powder should be the best choice."
Ye Kun had already instructed the alchemist to make pure silver powder and gold powder.
Dissolve silver in nitric acid to obtain silver nitrate. Add salt to produce white silver chloride powder, and then replace it with elemental iron to obtain gray elemental silver powder with extremely high purity.
Gold powder, made with aqua regia.
Sun Yi nodded: "Okay, I'll try adding silver and see what it looks like."
Ye Kun smiled and said, "After you make the mirror, we will study the thermos. If you put hot water in the thermos, it can keep the temperature for a long time. After a day and a night, it will still be hot when you pour it out."
Sun Yi was stunned: "Can you do it?"
"You are so smart, you can definitely figure it out!" Ye Kun was willing to encourage.
Sun Yi thought for a moment, then suddenly sighed, "I haven't seen Junior Sister Ding Ding for over a year. I heard she was in charge of the road repair. Where is it now?"
Ye Kun also sighed: "Junior Sister Ding Ding was taken away by Ye Qingyang. Now she is the chief engineer of bridge and road construction. She is very busy all day long. Not to mention you, I haven't seen her for a long time. The last time I received news, Ding Ding was still in the Southern Wasteland, Yunmian area."
The road construction project in the Yunnan-Myanmar area is Ye Kun’s key project.
The mountains there are called Million Mountains.
There are huge mountains, virgin forests, and countless river canyons, making road construction the most difficult.
Ding Ding is not only an engineer now, but also the project manager, silently dedicating his youth to the mountains.
Sun Yi rolled his eyes: "Junior Sister Ding Ding is in the south, crossing mountains and rivers, can she bear it? I'm afraid that in two years, she will become a savage."
Ye Kun smiled bitterly: "I also told my junior sister to come back and rest for a while, but she said no, it's fine."
Sun Yi sighed, "Pang Jia and I are not worried about Senior Sister Gongsun, but Ding Ding. You see, she is smart and capable, but in fact, she is in poor health and is very strong-willed. Master once said that Ding Ding might not live a long life."