On the first day, there was a Dan furnace that exploded, and on the second day, there were several more furnaces.

Pang Tong counted these fryers again, took out the duplicate materials, and combined them for refining them.

He returned to Jiangxia, but the time of the fifth day had already been finalized.

Every Dan furnace that exploded had sulfur nitrate in it.

It's just that in the next three days, Pang Tong used these two things to refine, although there was also an explosion, but the power of the explosion could not meet Pang Tong's requirements at all.

"There must be something missing." Pang Tong frowned and pondered.

"But what will be less?"

Pang Tong stared at the dozen or so "Dan Fangs" in his hand.

"These two things are indispensable, but there is one more thing, what will it be?"

Pang Tong also made people experiment with other things besides saltpeter and sulfur.

But the power of the explosion still could not reach the power of the gunpowder in Zhao Hui's hand.

And it was not as powerful as the previous accidental explosion.

At the same time, Zhou Yu, who was in Yangzhou, was also in a dilemma.

He, like Pang Tong, failed to understand what was missing?

Is it one less, or is it more?

Zhou Yu and Pang Tong haven't been able to figure it out yet.

However, Zhao Hui's army was less than five days away from Jiangxia.

"I just hate, you can't give me a little more time." Liu Bei sighed.

Pang Tong gave him hope, but they didn't have time.

"Why, can't you give me a little more time."

The unwillingness in Liu Bei's heart was even stronger than when he was in Xiangyang.

Now he finally sees hope, but Zhao Hui's army is right in front of him.

"Do I really want to give up Jingzhou and flee to Xichuan?"

When I went to Xichuan, it was even more difficult to come out in the future.

Although Yizhou is rich, but the mountains and forests are border, the road is far away, and it is difficult for others to capture Yizhou, but it is also very difficult for Yizhou to send troops to chase the Central Plains.

If you occupy Yizhou, it is best not to lose Jingzhou.

Pang Tong Zhou Yu was studying the matter of gunpowder, and he wanted to hide it from Zhao Hui.

After all, there are Dan furnaces exploding every day, and even if the sound is not as good as Zhao Hui's gunpowder, people outside can hear it clearly.

There is an explosion every day from time to time, as long as the news reaches Zhao Hui's hands, Zhao Hui can guess that Liu Bei and they are also studying gunpowder.

However, Zhao Hui was not very worried.

Saltpeter and sulfur must not be able to hide from Pang Tong Zhou Yu, they will definitely figure it out.

But there is one of the simplest charcoals, which is not so easy to find.

Only by adding charcoal, which is ground into a fine powder, can the power of the explosion be greatly increased.

Without thousands of experiments, without that flash of inspiration, it is still very difficult to discover the role of charcoal in it.

Even though Pang Tong and Zhou Yu are extremely smart people, they are not top students majoring in chemistry after all.

It's not like Zhao Hui, who already has a formula in his memory.

Therefore, although Zhao Hui received the news, he did not rush to attack Liu Bei and Sun Ce because of this.

The army is still moving forward steadily.

In addition, Zhao Hui was also waiting, and Xu Huang Liao Hua and Lu Meng led the water army to arrive.

With an army of 300,000 in his hands, it was still very difficult to cross the river to attack Sun Ce.

As for the chain boat, Zhao Hui didn't want to use it.

He had invincible warships and invincible sailors in his hands, although there were only 50,000 men, but it was enough.

The sailor cooperated a little, so that Zhao Hui's 300,000 army crossed the Yangtze River, and Yangzhou would also directly face Zhao Hui's army.

Jiangxia!

The Zhao army was coming, Pang Tong still hadn't made gunpowder, and Liu Bei was already thinking about whether it was time to give up Jiangxia and flee directly to Yizhou.

Liu Zhang in Yizhou is weak, and after he goes to Yizhou, he can completely seize power.

Then, they had a year to slowly study gunpowder.

The battle of Xiangyang made Liu Bei completely understand that he had no gunpowder in his hands, not to mention that his troops were less than Zhao Hui, even if his troops were twice as large as Zhao Hui, even if he had 600,000 troops in his hands, he would still lose to Zhao Hui.

The gunpowder in Zhao Hui's hand can already be inferior.

Whether it is a siege or a field battle, it can exert great destructive power.

Although Sun Ce promised to give Pang Tong a month, he did not send troops to Jiangxia.

For a month, it's just that Sun Ce didn't attack Liu Bei.

Otherwise, Zhao Hui didn't need to go south, and Sun Ce would be able to send Liu Bei Cao Cao's head to Xiangyang for Zhao Hui as a gift.

There was no gunpowder, and Liu Bei didn't want to rely on Sun Ce to resist Zhao Hui.

Even if Sun Ce sent troops to Jiangxia, he had no gunpowder in his hand, and he couldn't stop the Zhao army from attacking.

Under the bombardment of gunpowder, no matter how many people are, people will panic and then collapse.

"Shiyuan, still don't you have a clue?" Liu Bei came to the alchemy room.

Pang Tong shook his head: "How did Zhao Hui come up with it?" ”

Warlock alchemy blaster, Pang Tong had seen it in the book, but he didn't think too much about it at the time, and he looked down on these alchemy warlocks in his heart.

Now he can be sure of saltpeter and brimstone.

Dozens of other tests have been carried out, some with slightly larger explosions and some with less power. Some simply don't explode.

What is the specific reason?

Pang Tong still feels very messy now.

He felt that he was about to be caught, but every time he was escaped, it was always a little bit closer, which made Pang Tong feel very uncomfortable.

In just a few days, Pang Tong, who was only in his twenties, actually boiled out several gray hairs.

"Shiyuan, if there is no way, let's go directly to Yizhou." Liu Bei said.

Although after losing Jingzhou, it is very difficult to lead the army into the Central Plains if you want to take Yizhou as the foundation in the future.

But at least, they kept their hope.

After going to Yizhou, they will develop with peace of mind and wait until the world changes.

Otherwise, just die of old age in Yizhou, and leave everything to future generations.

asked him to surrender to Zhao Hui, and Liu Bei was also very resistant in his heart.

Although it is not necessary to say that he can't, after all, he has a thick skin, if he is really captured, or if he can't escape, Liu Bei will not die, he will choose to surrender, and he is the gentleman Liu who can bend and stretch.

"My lord, give me three days." Pang Tong said.

None of them are people who give up easily.

Although he is only twenty-two years old, Pang Tong is well-read, whether it is the Four Books and Five Classics, the Hundred Schools of Thought, and those strange talks from Youzhou, as well as those strange theories and miscellaneous essays, as long as they can be seen, Pang Tong will read them.

Others are sleeping when they are bored, and when they are bored, they are reading books, and while reading, they drink.

"Shiyuan, don't be too sad, you still have to have a good rest, it's really not good, let's go to Yizhou." Liu Bei saw that Pang Tong had an extra white hair on his head, and stretched out his hand to pull it out.