Pei Yuxing paused, but did not look back.

Emperor Yongsheng said, "I will give you five years, and after five years, you will definitely have to marry a wife." ”

There is not a prince who does not marry at the age of twenty-five.

Especially a prince he is very optimistic about.

So five years is the longest he can pamper himself.

Hearing this, Pei Yuxing's narrow phoenix eyes narrowed slightly. wa✾p✵❋.fen✼gs✥fo

Five years!

Five years is a very tight timeframe.

However, it's only when it's challenging that's fun.

Pei Yuxing strode out of the palace.

That night, Pei Yuxing went to see Zhong Shuyu again, and this time Zhong Shuyu did not turn him away.

The two met and had dinner.

Just like when I hadn't pierced that layer of paper before, there wasn't much intimacy, but there was a little more ambiguity than when I hadn't pierced that layer of paper.

In modern parlance, it is above friends, and lovers are not full.

……

In the following days, as he started to work, Zhong Shuyu entered a busy state of work again.

The work of the Hanlin Academy continued the previous revision step by step.

On the side of the Invention Institute of the Ministry of Industry, limestone raw materials, gypsum and other raw materials, because she had already said it before Mu Xiu, so the raw materials were ready as she said on the second day of Zhong Shuyu's work.

When the raw materials are ready, they must be ground into raw meal first.

Nowadays, there is no mechanical tool operation for grinding raw meal, and it is all by hand, first by people with a hammer to smash the limestone into small pieces, and then by the grinding disc for grinding.

This is a step, because Zhong Shuyu is also the first time to engage in cement experiments.

Previously, there was only theoretical knowledge, so she had the craftsmen grind three sizes.

One is that the particles are larger, the size of a fingernail.

A medium to large particle.

The second is to grind it completely into powder.

While doing these things, Zhong Shuyu specially distributed masks to the craftsmen she asked Zhang Yinghua to make herself, because there will be a lot of dust in the process of making cement.

If you don't take protective measures and suck the dust into your lungs, you can easily get lung disease.

In this era, it is difficult to cure this disease.

But some craftsmen are obviously not used to wearing this to do things, although it has been said that they will die if they absorb too much dust, but Zhong Shuyu will still tear it off as soon as he turns his gaze.

In the end, Zhong Shuyu insisted that if he didn't wear it, he would deduct the money, and these people were finally obedient.

After the raw meal is ready, the next step is to prepare the calcined mature material.

But Zhong Shuyu did one more step before calcining.

Because she did not know the specific proportion of raw materials, such as limestone, clay, iron ore and coal, whether it was equal to the same ratio, or which one had a higher proportion and which one had a smaller proportion.

So Zhong Shuyu specially prepared a variety of proportional formulas.

In this way, when all the ingredients are calcined, you can judge which formula ratio is the best.

Once everything is ready, it is natural to send the raw meal to the kiln to calcinate the mature material.

The first raw material Zhong Shuyu put in was limestone, which accounted for 50%, and the others decreased accordingly.

After putting it in.

At this step, as long as the temperature can reach more than 1000 degrees, the calcium carbonate will decompose.

But in this era, there is no thermometer, Zhong Shuyu naturally can't see the temperature, but she has learned that now there is coal that can be used, so the kiln for burning porcelain can basically reach a high temperature of 1200 degrees.

Sometimes it even reaches 1400 degrees.

So in other words, the high temperature of firing cement clinker is not afraid to be reached.

Next, in the process of calcination, there is nothing else to do, just wait.