Alchemy is in the hands of Zhao Yu, and in the hands of Hua Tuo and others, the way it is embodied is completely different.

Zhao Yu's alchemy used mana to attract the fire in the wood to urge the jade pill furnace, using the method of immortal dao, which was convenient and quick to refine.

But Hua Tuo and the others, and even Zhao Ji and Da Qiao, the alchemy they learned was a refining method compiled by Zhao Yu in order to facilitate mortals and deal with mortals' abilities.

They had no mana, they couldn't light the fire in the wood, and they couldn't urge the jade furnace.

After all, the jade pill furnace is a semi-magic weapon that has been refined to a certain extent, and no fire can be urged.

Therefore, whether it is Hua Tuo and others, or Zhao Ji and Da Qiao, the Dan furnace used to learn alchemy is an ordinary bronze Dan furnace. Burning wood and using ordinary fire, just like decoction, has more processes and more complex refining methods.

They don't have mana, and they can't directly use their divine soul and spiritual sense, so when refining, the grasp of heat and timing depends more on experience and feeling. It was absolutely impossible for them to be like Zhao Yu, who could refine dozens of pills in a casual furnace.

Even if you really learn alchemy, if you open the furnace ten times, two or three times to refine the finished product, you can be considered highly skilled.

It is never possible to achieve a 100% yield rate.

This is the limitation of mortals.

It's really hard to grasp the heat and timing.

Sometimes Zhao Yu would wonder if if he could make an assembly line, whether he could keep the heat and timing constant and make it a mass production pill.

But then it was denied because it was impossible.

To refine the pill, it is necessary to have the most accurate grasp of the medicinal properties. However, there are differences in the depth of medicinal properties between the plants of medicinal herbs. Even if the same two packets of medicinal herbs have the same weight, because the plants are different, their medicinal properties are also different.

And the difference in medicinal properties determines the timing of the civil and military conversion of the fire when refining the pill, as well as the timing of the Dan.

Comparing the pill with the Western medicine of modern time and space, one is in the sky and the other is on the earth. Western medicine can be mass-produced, but the demand for accurate medicinal properties of Dan pills is much higher than that of mass-produced Western medicine. Once there are some slight differences, not to mention the abolition of refining, it can even refine poison.

Therefore, alchemy, for mortal healers, lies in two elements: experience and feeling. If you refine more and have more experience, the rate of becoming a pill will increase. Those who have good talent feel sensitive, have a stronger grasp of timing, and also have a blessing effect on the success rate.

In this way, Cheng Dan consumes more than medicinal materials.

If one hundred catties of various medicinal materials could refine two hundred pills in the past, it was because in the hands of Zhao Yu, who knew the basic alchemy well, there was no possibility of failure. And in the hands of ordinary healers, even if they have completely learned alchemy, a hundred catties of various medicinal materials can refine one-tenth, that is, twenty pills, which is already very remarkable.

Of course, the higher the martial arts cultivation of the alchemist, if the alchemist's cultivation enters the realm of Qi and Seeing God, the divine soul will gradually become acute, and the senses will gradually improve, and the alchemy will also be blessed.

After removing all of the above, the medicinal effect of the pill refined by Zhao Yu was more than twice as strong as that of the pill refined by ordinary methods after being streamlined and weakened. It's not about the medicinal materials, it's about the means of refining. It lies in the difference between the fire in the mortal fire and the fire in the wood, in the difference between the half-dharma instrument Dan furnace and the ordinary Dan furnace, and in the difference between the powerlessness.

However, as long as mortals can refine it, it is okay if the medicinal effect is poor, and it is okay to consume more, everything is worth it.

For several days in a row, Zhao Yu was pointing at Zhao Ji and Da Qiao hand in hand.

The knowledge of alchemy is all in their minds. In the process of learning and practicing, this knowledge is absorbed by them bit by bit. Especially Zhao Ji, because of her advanced cultivation, she only refined the first furnace of Yang Yuan Dan after Hua Tuo. Da Qiao's cultivation is one level worse, and the grasp of the heat and timing is not enough.

But as long as you persevere and experience comes up, everything is not a problem.

It's Xiao Qiao, who is a girl, watching her sister's alchemy, and also shouting to learn. But after only two days of study, I was not interested, and I didn't know where to go crazy in a blink of an eye.

Ru Mi Zhen is not very interested in this. Sun Ren, on the other hand, devoted himself to practicing martial arts. Her martial arts cultivation is also the highest among Zhao Yu's five wives and concubines, except for Zhao Ji.

The three years of Jian'an have passed in a flash, and it seems that it is the end of the year.

In the depths of winter, the smoke finally stopped temporarily.

Cao Mengde took the time to come to the other courtyard, chatted with Zhao Yu for a long time, and left in a hurry.

He was too short on time.

However, eleven disciples such as Han Shu and Cao Ang came to the other courtyard together this time, stayed in the other courtyard for half a month, and only left the other courtyard after the Shangyuan Festival.

This year has been a year of great strides for Cao Mengde.

In the first half of the year, he defeated Yuan Shao, and in the second half of the year, he cleaned up the northern Hulu barbarians.

At the beginning, Yuan Shao and Gongsun Zan were connected with Karasuma and Xianbei, and more than 100,000 Hu rode south, and the momentum was indeed not small.

But in the face of Cao Mengde's strong soldiers, what Hu Qi, what Karasuma Xianbei, are all floating clouds.

Coupled with the fact that his internal opinions were not unified, Gongsun Chan was actually not very willing to intervene in the internal war of the Han Dynasty.

Gongsun Zhan, although he has no talent, can be regarded as half a hero for the Han. Gongsun Zhan has always been tough on his attitude towards the northern Hulu. At the beginning, he even had a great conflict with Liu Yu in Youzhou.

Gongsun Zhan killed Liu Yu, this reason cannot be ignored.

Liu Yu is gentle, and Gongsun Zhan is violent. Liu Yu believes that he can recruit Karasuma and other Hulu for his own use. But Gongsun Zhan thought that his heart would be different if he was not of my race, and Hu Lu was afraid of power but not virtue. Liu Yu solicited, and he went to fight. Therefore, the two sides are full of contradictions.

In fact, in the troubled times of the late Han Dynasty, Liu Yu's behavior was wrong. Hu Lu will not go south because you are gentle and you are good to him. The weaker the Han is, the more Hu Lu will go south. Gongsun Zhan's resoluteness was a strong deterrent to Hu Lu.

To say that he is half a hero, here's why.

Gongsun Chan is half of the barrier that blocks the barbarians in the north.

Although Cao Mengde was powerful and unrelenting, and after defeating Yuan Shao, he still had to seize Youzhou, Gongsun Zhan reluctantly agreed to Yuan Shao's strategy of tying up with barbarians, but if he was reluctant to do so, there would be hidden dangers.

If more than 100,000 Hu Qi can make a contribution, maybe this contradiction will not be exposed for the time being. But it's a pity that Cao Mengde ordered Xiahoudun to take the initiative to attack, and in Shanggu, with 30,000 against 100,000 Hu cavalry, he broke through a frontal battle, beheaded more than 20,000, captured more than 10,000, and the rest were defeated.

In this way, the alliance between Yuan Shao and Gongsun Zhan suddenly broke.

As Xiahoudun continued to march into the army, Gongsun Zhan died in Liaoxi, and Yuan Shao fled to Liaodong alone.

Before the end of the year, Xiahou Xuan's department had already occupied the entire territory of Youzhou, and Yuan Shao fled to Goguryeo, but half a month later, he was sent back to his head by Goguryeo.