The Red Mansion Big Liar.

Chapter 313 Broadening Your Mindset
"It is common knowledge that gold and silver of the same size have different weights. But how much should a bar of gold or silver weigh?"

In the lecture hall, Zhang Yunyi looked around.

The teachers in the audience looked at each other in confusion, wondering why he asked such a common sense question.

Someone boldly said, "Your Excellency! Most government silver is fifty taels per ingot!"

Zhang Yunyi slammed the table and said, "Well said! But why did you add the official silver?"

"Official silver is of high purity, while private silver contains many impurities..." The man seemed to be hesitant to speak.

"That's right!" Zhang Yunyi asked knowingly, "What's your name?"

Under the envious gazes of the crowd, the man straightened his robe and bowed: "Your Excellency! I am Wu Qi..."

This was not the first time that Zhang Yun逸 had taught a class. Now, everyone in the Taoist school considered themselves his students.

As the founder, he accepted it calmly.

“Purity!” Zhang Yunyi stretched out his right index finger, pointed to the sky, and said, “As long as it is pure silver, then if the size is the same, the weight must be the same. As long as we understand the relationship, the reverse is also true. If the weight doesn’t match, it means there are impurities!”

Zhang Yunyi looked at Wu Qi and said with a smile: "I see that you have something to say just now. I guess you have thought of the possibility of lead being cast in silver. But lead is lead after all. In addition to distinguishing it by color, this method can also be used to distinguish it! I call this density!"

As he spoke, he held up several silver cubes of different sizes and said, "We have previously calculated the weight of one cubic meter of water. Assuming the density of water is 1, by measuring the ratio between different sizes of pure silver and water, we can calculate the density of silver, or even any metal..."

Zhang Yun逸 had no experience in education, but he was planning to make a name for himself by building an ironclad ship.

So, I originally planned to start with buoyancy, but halfway through I found that it involved many problems, so I simply started talking about the concept of density.

The surfboard-like wooden boards at the hot spring villa were made by craftsmen as teaching props for entertainment purposes.

The more basic something is, the more precious it is. These things were common sense known to everyone in the previous life, but they were invaluable data in ancient times.

Although, he could still remember some of the densities of commonly used metals.

It is better to teach people how to fish than to give them fish. If everyone expects him to give the final answer, it will go against his original intention of running the Taoism school.

If this could enlighten people, his journey through time would be worthwhile.

And with glassware, many things become simpler.

He even went so far as to build several large experimental sites around the Xianxue.

After all, when it comes to combining theory with practice, people of this era do not have the insight of people in previous generations.

Moreover, if the first group of people who are exposed to the relevant knowledge cannot understand the principles behind it, how can they teach good students?

He spoke a lot of words, then took a sip of the tea on the table and continued, "The uses of density are not limited to this. Last time I took you to visit a glass factory, you should have seen the tin pool of flat glass. That also uses this principle. The density of tin is greater than that of glass, just like oil floating on the water..."

He paused and added: "Of course, we can't generalize. Some things are soluble in each other, like sugar and salt are soluble in water, and some are just like oil and water. We still need to slowly explore these in the future..."

Since most of the students of Taoism are children of craftsmen, learning literacy and calculation is essential.

At present, the teaching of Xianxue is divided into two aspects.

On the one hand, he helped the children of craftsmen to lay the foundation, and on the other hand, he gave special training to the instructors.

Of course, since some aristocratic families sent their illegitimate sons to study, they were not prevented from attending as auditors.

Wu Qi, whom Zhang Yunyi had just pointed out, was the illegitimate son of Wu Tianyou. Wu Tianyou was nothing special, as he was also from a noble family. However, he did not get along with the four kings and eight dukes, and they were even somewhat at odds with each other.

However, his daughter was the concubine of the King of Qin. This relationship was enough for Zhang Yunyi to treat her differently.

However, since the matter was too obvious, it was inevitable that people would point fingers at him. When Zhang Yunyi saw him speak just now, he deliberately left a number.

This is not the first time he has done something similar.

Prior to this, several children sent by officials from Shuntian Prefecture to support the event were also selected, as well as the illegitimate son of Zhou Chengru, the Minister of Works, and several teachers.

It wasn't too conspicuous to mention Wu Qi at this moment.

Of course, the master leads you to the door, but the practice is up to you. If these people are hopeless, they are just unpopular bastards in the family, so it is enough to show some mercy to them, and there is no need to spoil them.

……

While Zhang Yun逸 was teaching carefully and enlightening the people, Jia Zheng had been ill for many days.

In the past, no one would insist on taking a leave of absence, let alone for ten days or half a month, even for a year or two.

But now, the Ministry of Industry has urged us many times.

However, returning to the Ministry of Industry, I will inevitably have to face those ridicules and sarcasms.

When he thought of this, Jia Zheng felt humiliated and it was more painful than killing him.

He already knew that the emperor had granted the marriage because of the efforts of Lady Jia and Mrs. Wang, and he couldn't help but blame Zhang Yunyi for interfering.

If he hadn't been so talkative, how could there be a wedding garden?
Now, not only has the money been spent, but many variables have also been added.

However, although he cursed Zhang Yunyi's ancestors in his heart, he also knew that the situation was stronger than the person.

If she wanted to break the impasse and regain her face, she could only hope that he would speak well of her in front of the emperor.

But when he thought about the bad things that happened every time he went to see Zhang Yunyi, he was discouraged.

It can be said that if you stick your head out, you will be cut by the sword; if you hide your head, you will also be cut by the sword.

However, between two evils, one has to choose the lesser one. The embarrassment in front of Zhang Yun逸 will ultimately be limited to the mansion. But if the matter is delayed any further, it will become a laughing stock in the whole court.

Just when he finally made up his mind and decided to go to the East Palace for help rather than a long pain, he decided to go to the East Palace for help.

As soon as I arrived at the door, I heard the servants whispering outside.

"Master Yi is different. Even a house like the East Mansion needs to be renovated!"

"I'm afraid that Master Zhen died in disgrace, so he feels that living here is unlucky?"

"Uncle Zhen died in the backyard. A while ago, the construction of Huifang Garden started. I heard that Uncle Yi moved to the hot spring villa outside the city. He said that he wanted to turn every room into a warm room."

Hearing this, Jia Zheng's eyes suddenly gleamed with a sharp light, and his movement to push the door paused.

He squinted his eyes and stood at the door thinking for a long time. Slowly, a method that would achieve the best of both worlds and minimize the damage gradually took shape in his mind.

He straightened his robe, waited until the noise outside the room died down, then he took a deep breath, pushed the door open, and headed straight for Rong Xi Tang.

……

(End of this chapter)