Hearing this, Shen Yu's face turned pale. This time, she heard the coldness in the eldest prince's words.

She also had to rely on the eldest prince to be the most noble woman, and she must not be abandoned by the eldest prince.

She felt that just relying on a formula for explosives would not be enough to convince the eldest prince to marry her willingly.

"Your Highness, I know that the great things you are seeking are not something a small person like me can interfere with. However, I do know one thing: to achieve this, you need not only powerful weapons but also money. I have a few money-making ideas. As long as Your Highness has people follow my methods, I guarantee that we will make a fortune. Not to mention hundreds of thousands of taels of silver, even millions or even tens of millions of taels will not be a big deal."

When the eldest prince heard Shen Yu say this, he immediately let go of his hand.

He knew that what Shen Yu said was right, and he was in urgent need of money.

You know, if you want to raise soldiers quietly, in addition to keeping it secret, you also need a lot of money.

Even if he has a lot of property under his name, the money he spends to support tens of thousands of private soldiers is definitely not a small amount.

He also tried to find ways to increase his income, but the increase was not small, but the consumption was even greater, so that as a prince, he was often troubled by financial problems.

Now hearing Shen Yu say this, he felt hopeful. As for whether Shen Yu would deceive him, he was not worried.

He had someone investigate Shen Yu's background a long time ago. Shen Yu was just lucky enough to be chosen by Prince An's Mansion and became the mansion's cousin for a while.

But now Shen Yu has been driven out of Prince An's Mansion and has no one to rely on in the capital. If Shen Yu is smart, he will know what to do.

"Miss Shen, as long as you can make the explosives and come up with an idea to make money, the prince can promise you that after marriage, you will be the mistress of the mansion."

"Grand Prince, please rest assured. What I say is entirely true."

So Shen Yu asked the eldest prince to send people to buy charcoal, saltpeter and saltpeter, the three raw materials for making explosives.

Although the eldest prince did not doubt that these seemingly insignificant things could really be made into explosives that could blow people away, he would not miss any possibility and immediately sent people to buy them.

Then Shen Yu wrote down three ways to make money on paper: soap, rouge, and movable type printing.

The first two princes didn't care because there were already people selling soap in the capital. Whether he washed his hands or his face, he would use soap, which was indeed good. He also knew that the soap business in the capital was run by Miss Yun Ran from the Prime Minister's Mansion.

He had also thought about making a fortune, but because Prime Minister Yun did not take action, he could only watch as countless money flowed into the Prime Minister's Mansion.

He also tried to recruit Prime Minister Yun, but every time they met, Prime Minister Yun was vague with him and never made his attitude clear.

But he had already received the news that Prime Minister Yun had defected to the second prince and stood in the second prince's camp, which made him hate Prime Minister Yun very much.

However, he also knew that this could not be done. If he wanted people to follow him willingly, he had to give them what they really wanted. He could not satisfy Prime Minister Yun, but the second brother could do it, so he naturally could not complain.

Now Shen Yu gave him a surprise. He could also get someone to do the soap business, so he wouldn't feel bad about the money going to the second brother.

Suddenly, the eldest prince's expression brightened, and he hurriedly asked Shen Yu: "Miss Shen, this movable type printing technology can really improve printing efficiency."

Shen Yu was not satisfied with the eldest prince's reaction. She said that for the ignorant ancients, movable type printing was a great invention and no one would not be tempted.

"That's right, Your Highness. Compared to current printing methods and woodblock printing, the efficiency is more than ten times higher."

"You didn't lie to the prince. Do you know what happens if you do lie to the prince?"

"Your Highness, if you want this so badly, how dare I lie to you? I'm telling the truth. If you don't believe me, you can find someone to carve it now. You'll know after trying it."

The eldest prince also knew that his reaction was a bit excessive, but it was really not his fault.

You should know that books have been expensive since ancient times, which is why ordinary people cannot afford to read.

Because the efficiency of both calligraphy and woodblock printing is very low, especially calligraphy, and the quality cannot be guaranteed.

After all, everyone's handwriting is different, and there is no guarantee that everyone can write well. Moreover, it is time-consuming and laborious to write well.

Besides, people who can afford to read must have savings at home and will not waste their precious time on reading.

Only extremely poor scholars would squeeze out time to read for the sake of that little bit of tuition.

To print a book using woodblock printing, you need to carve a large number of templates. Sometimes the templates for a book can fill up an entire room.

In addition, if the craftsman is distracted for a moment during the carving process and carves a wrong character, then the whole version will be scrapped and can only be started over, which invisibly increases time and effort.

Now that he had movable type printing technology, as long as he made the right molds, he could print a large number of books in a short period of time. Then he could hire someone to specialize in this field and recruit more people from poor families to print for him. At the same time, he could also make a lot of money from selling books.

I feel extremely excited when I think that he will have many students all over the world in the future.

"Miss Shen, you are truly the lucky star of the prince. You can stay in the mansion with peace of mind. I will ask the housekeeper to select a few people to serve in your yard."

"Yes, Yu'er will obey the eldest prince."

The eldest prince said nothing about Shen Yu's unauthorized change of his name. He picked up the soap, rouge, and the movable type printing method and was about to leave.

"Grand Prince, please wait a moment."

“Miss Shen, what’s wrong?”

"Grand Prince, aren't you planning to have someone start a rouge business?"

"How much money can a woman earn from selling things? The prince doesn't even bother to make money from women."

When Shen Yu heard the eldest prince say this, he chuckled.

"You don't know, my Lord, that women are the easiest to make money from."

Today, the eldest prince learned that Shen Yu could make explosives and had obtained the soap formula and movable type printing technology. He was in an unprecedented good mood. He did not care about Shen Yu's unreasonableness. Instead, he asked Shen Yu in a good-tempered manner: "Miss Shen, what do you mean?"

"Grand Prince, you are of noble status. It is impossible for you to be personally involved in business in the past. Naturally, you don't know much about the details involved."