That night, Jian Yu presented his thoughts in writing.

At noon the next day, Jian Yu took the drawings in his hand and came to the manufacturing office.

The raw materials used to make glass are soda ash, limestone, and quartz, which are not hard to find.

Jian Yu ordered people to grind these raw materials, mix them according to the appropriate proportions, and then put them in a kiln to heat.

"Bang-"

A loud bang sounded, which meant that Jian Yu's first attempt had failed.

But Jian Yu didn't admit defeat.

Although the conditions in ancient times were a little worse, she didn't believe that she, the champion of the double department, couldn't make a piece of glass!

So, under her tenacious fighting spirit, finally at nightfall, the glass was born.

Just when everyone finally breathed a sigh of relief and felt that they could rest, Jian Yu suddenly said that he would increase production.

Not only that, but she also plans to make tinted glass and make crafts.

In this way, the night passed, and the people in the department were stunned that they didn't sleep well.

And Jian Yu, because his brain was too excited, he didn't feel sleepy at all.

After the first batch of glass was made, she led a team of people to carry the glass and install it in her dormitory.

After the installation, Jian Yu looked at his results and nodded with satisfaction.

Xu Sheng on the side was completely shocked.

The glass made by Jian Yu is installed on the house, which can better let the sunlight pass through the house, make the whole house brighter, and better see the outside and inside.

He looked at Jian Yu with a look of surprise, he never expected that the little emperor who only knew how to have fun would be able to make such a thing.

Not only that, but in the next few days, Jian Yu also taught the people in the Si Zuo Department to blow glass, and make handicrafts from glass out of the palace and flow to Pu Shuoling's shop, in exchange for a lot of money.

In just a few days, most of the utensils in Jian Yu's bedroom were replaced with glass.

Moreover, there are some knick-knacks in her bedroom, all of which are made of glass.

These days, just counting the money is enough to make her hands soft.

It is believed that it will not be long before the current problem of the national treasury deficit can be solved.

However, there is another factor that restricts the recovery of the economy.

The rebellion in the south, no matter how you put it, can also set back the economy of Donghui by a few years.

Although the economic center of Donghui is in the north, the south is called the granary.

All in all, whether it is the south or the north, once something goes wrong, it will affect the national strength of Donghui Kingdom.

Jian Yu now wants to go to the south again.

It's not that she wants to join in the fun, it's that she's genuinely worried.

Originally, there would be a battle report within three days, but it has been almost half a month, and no news has come.

June has arrived, the weather in the south is unusually hot, and the soldiers sent by the imperial court are prone to be unaccustomed to the situation.

Coupled with the fact that the battle report has not come for a long time, it can be seen that the southern side is not going well.

Looking at the big sun outside, Jian Yu couldn't help but sigh in his heart.

She looked at Su Lianhai next to her, "Su Lianhai, go find me some saltpeter." ”

"Your Majesty, are you looking for saltpeter, do you want to do something?"

Recently, the emperor often wants to make something strange on a whim, and he feels that this time it is like that again.

Jian Yu nodded, "In addition, bring me a basin of clean, drinkable water, a few bowls, and bring some fruit by the way." ”

However, after a while, Su Lianhai brought a few little eunuchs with saltpeter, a basin of water and some seasonal fruits.