When Zhao Yun was about to arrive in Wu County, Sun Ce and Zhou Yu retreated to Huiji County.

But the sailor in Xu Huang's hands then arrived in Huiji County.

Zhou Yu and Sun Ce could only continue to retreat to Linhai County.

In Linhai County, Zhou Yu finally experimented with the formula of gunpowder.

Rumble!

"It's finished."

Zhou Yu looked at the collapsed house, but he was not annoyed at all, but laughed.

He didn't even know how many times he had experimented and how many things he had tried.

"Finally got me out."

At this moment, Zhou Yu was very excited.

During this time, he had been avoiding the battle, and when the Zhao army caught up, they retreated.

All his thoughts were on the study of gunpowder.

Now that he has finally succeeded, this sense of accomplishment is even stronger than the one he helped Sun Ce occupy Yangzhou before.

The sense of accomplishment at this moment is the strongest moment in his life.

I've never felt it before.

He tilted his head, looked at the sky, and laughed out loud.

I vomited out all the depression and disappointment of these days.

His laughter finally regained his former self-confidence.

Sun Ce had already arrived, but looking at Zhou Yu who was laughing, he just stood on the side and watched, and didn't want to disturb Zhou Yu.

As a brother, in this short period of time, Sun Ce wanted Zhou Yu to give up and stop studying the so-called gunpowder.

What he wants is a heroic and confident Zhou Yu, the Zhou Yu who captured the enemy city while talking and laughing.

Instead of Zhou Yu, who is in the alchemy room every day, making a disgraced face.

"It finally worked." Sun Ce also had a smile on his face.

However, it was not because he had gunpowder that he could resist Zhao Hui.

It's because Zhou Yu was finally liberated from the alchemy room.

Zhou Yu can finally continue to run the army for him.

Although the 100,000 sailors in Zhou Yu's hands were almost wiped out in the battle of the Yangtze River, Sun Ce still had great trust in Zhou Yu's ability.

Attacking the city and plundering the fortress on land, Sun Ce himself was confident that he could command a battle of a million people.

But for the battle of the sailors, it still depends on Zhou Yu.

"Gong Jin, you finally succeeded."

When Zhou Yu's laughter stopped, Sun Ce stepped forward and said.

"Bo Fu, you just heard that."

Zhou Yu just now had a lot of time to laugh at tea. But now, he is still very excited.

If Pang Tong hadn't drunk too much wine at that time, Pang Tong would have been unable to help laughing.

This sense of accomplishment is something that none of the things they have done in the past can be compared.

"I hear you." Sun Ce said: "This power is definitely no worse than Zhao Jun's gunpowder." ”

"Really, it was so surprising to me, I didn't expect that in addition to sulfur and saltpeter, the third material turned out to be charcoal."

To this day, Zhou Yu still finds it unbelievable.

The chemical formula of the gunpowder explosion or something, he didn't know at all.

Saltpeter and sulfur are very long things in alchemy, as well as lead and mercury, which are commonly used materials by those warlocks when they make alchemy.

But the third material, charcoal, is something that rarely appears on Danfang.

During this time, Zhou Yu has been researching various Dan prescriptions, and he has seen hundreds of Dan prescriptions, not to mention hundreds of them.

As long as it is a drug or material that appears in the Danfang, he will try it one by one.

After coming to Lin'an County, he finally chose charcoal, which seemed impossible at all.

But it turned out to be a success.

"Bo Fu, can you think of it?" Zhou Yu was very excited.

For the first time in years, he was so excited.

Even when he married Xiao Qiao, he was not so excited about the candles in the cave room.

"Gong Jin, now that gunpowder has been researched, when can it be used in battle?" Sun Ce said.

They have now retreated to Linhai County, and most of Yangzhou has fallen into the hands of Zhao Hui.

Now that he has successfully developed gunpowder, Sun Ce does not want to retreat.

"Give me three days to use it on the battlefield."

The gunpowder in Zhao Jun's hands is very strictly controlled.

Zhou Yu and Sun Ce have never been able to get samples from Zhao Jun.

So far, I only know that Zhao Jun's gunpowder is in clay pots.

Then ignite the fuse when firing.

I didn't see it, but I could guess it.

As for the optimal ratio of the three materials, Zhou Yu didn't have time to calculate it.

Anyway, the sound and power of the explosion, as long as it is not too different.

Sun Ce immediately began to ask people to prepare clay pots.

While letting the potter burn at full power, he also went to the people's homes to buy.

The value of clay pots is not as good as porcelain, and people can have several in their homes, either to hold water, or to hold rice and other things.

It has been used for several years, and now Sun Ce is willing to buy, and many people are still willing to sell.

It's just that they are willing to sell, and Sun Ce doesn't accept all of them, after all, the clay pots in people's homes have been used for many years, and many of them are missing.

Such clay pots simply cannot be used.

Sun Ce's plan to buy clay pots from the people did not go well.

Not only are there gaps, but the size of the clay pots in every household is also different, some are tall and some are short.

Sun Ce was reluctant, so he got a few hundred that could be used.

Others need to wait for the potter to fire.

Zhou Yu's speed was very fast, and while letting people make gunpowder, he immediately put it into the clay pot, got a fuse, and sealed the clay pot.

After installing it, Zhou Yu also personally tested a few.

Because the ratio of saltpeter and sulfur charcoal is different, and the size of the charcoal powder is also different, the power of several clay pots is also different.

But now, Zhou Yu can only settle down.

He himself had not been able to fully determine the proportions of several materials, let alone the others below.

When configured, just rely on their own feelings. Nor with precise measurements.

Although there are many flaws, Zhou Yu and Sun Ce are ready to use these clay pots to let Zhao Jun have a good experience of being bombed.

Zhao Yun had already led a large army towards Linhai County.

On the way, he received the latest message.

"In Sun Ce's hands, there may already be a large amount of gunpowder now." Zhao Yun will call his lieutenant.

"The whole army is on guard, let the scouts find out everything within fifty miles of the army."

Zhao Yun was well aware of the power of gunpowder, if the army was ambushed by Sun Ce and bombarded with gunpowder.

The 50,000 army in his hands was also easily defeated.

With a weapon like gunpowder, it can be more dangerous than ever when you are ambushed.

It's easy to do more with less.

Although now received the news that only the spies were in Linhai County, a loud explosion was heard. He didn't see gunpowder in Sun Ce's hands with his own eyes.

But Zhao Yun was still very careful.

After sending scouts and exploring the surrounding area for fifty miles along the way, Zhao Yun sent additional men to Linhai County to keep an eye on Sun Ce and Zhou Yu's every move.

With most of Yangzhou falling into the hands of Zhao Hui, plus the previous defeats, some soldiers died in battle, and some soldiers fled, and now Sun Ce's hands can only use about 50,000 soldiers.