The Tong family's Dan furnace is just a very ordinary alchemy pill furnace, and this low-level Dan furnace has a common feature, that is, there are at least two or three Dan troughs in it.

The so-called Dan trough is the place where the herbs are placed before alchemy, and there are at least dozens of Dan holes of the same size below, and with the continuous deepening of the alchemy process, the herbs in the Dan trough will naturally be transformed into pills of equal size and condensed into the Dan holes.

This is also known as the large-scale alchemy method, which is only suitable for refining low-grade pills.

Generally speaking, only low-level alchemists will use such a Dan furnace, because low-level Dan masters do not have too strong divine sense, when alchemy, it is already very difficult for them to control the heat, and there is no extra energy to pay attention to the situation of the herbs in the Dan furnace frequently, and at the appropriate time to regulate the heat to transform all the essence of the herbs into pills, but using this kind of Dan furnace can solve this problem very well.

As long as the Dan master puts the herbs into the Dan trough, he puts most of his energy on regulating the heat during alchemy, and pays attention to the heat not to be too big or too small, because the heat is too large, which will cause damage to the herbs, and it is possible to completely burn the herbs or drain the essence of the herbs; the heat is too small to make the Dan furnace continue to be heated, and the herbs are not heated enough, so naturally they cannot be condensed into pills, so as long as the heat is controlled, generally speaking, the final pill formation rate will be maintained at more than 20%.

Twenty percent, this data is a bit low alone, but under the total number, it is not low, take the Dan furnace of the Tong family as an example, four single slots, there are seventy-five Dan holes under each Dan trough, together it is three hundred Dan holes, and the rate of Cheng Dan is twenty percent, that is to say, as long as the amount of herbs is enough, the last furnace can produce at least sixty pills, which is also a low-grade pill, and a furnace of high-grade pills can produce ten pills!

However, the high-grade pill is not such a refining method, and the Dan furnace used is not this kind of Dan furnace with a Dan groove, refining the high-grade pill naturally has high requirements for all aspects of the alchemist, and this kind of Dan furnace naturally cannot meet these requirements of the alchemist, but will only restrict their alchemy.

Not to mention these for the time being, but said that Tong Chen opened the Dan furnace and looked inside, only to see that most of the pills refined were full of Cheng Dan, he couldn't help but be happy in his heart, and counted carefully, this furnace pill actually refined more than 240 pills of Huang Ling Dan, and the Cheng Dan rate reached more than 80 percent, and he was a little surprised.

However, what surprised him the most was not this, but the Ziyang Holy Fire, although he had long known that the Ziyang Holy Fire was powerful, but he didn't expect that it would only take two hours to refine this furnace of pills with the Ziyang Holy Fire, and it would take two hundred and forty pills of the Yellow Spirit Pill to be refined in two hours, what kind of concept is this? The simple explanation is that as long as he wants, he can refine thousands of Yellow Spirit Pills in one day, if the major immortal cultivation forces near Yuquan know, I am afraid that even if they use all means, they will have to snar him under their own doors.

According to Tong Chen's original plan, he originally wanted to refine two furnaces of Huang Ling Pill, but now he has changed his mind, he refined this furnace of pills and produced more than two hundred and forty pills of Huang Ling Pill, which is almost twice as much as before Old Man Qian, and Old Man Qian used to spend at least ten days and half a month refining each furnace of pills, but he only used two hours, this gap is no longer a simple gap.

The reason why he wanted to help the Tong family refine the pill was mainly to help Zhao Lan share the pressure with Old Man Qian, and he didn't really want to contribute to the Tong family, so with these more than 200 pills of Huang Ling Pill, Tong Chen felt that it was enough, he didn't need to make efforts to refine more pills for the Tong family, to be honest, Tong Chen hadn't thought about whether to hand them over to the Tong family for the time being, but for the time being, he was not in a hurry to think about it, after refining the pill for the Tong family, he would have to work for himself next.

The so-called busy work for himself means that he wants to refine the Qingxin Pill and take it to Wanbao Commercial Bank the day after tomorrow, which is also what he told Lu Wanning today.

Although the Qingxin Pill has its extraordinary, but in the final analysis, it is only a low-level pill, so Tong Chen plans to use this Dan furnace of the Tong family to refine it, this time Tong Chen still uses the Ziyang Holy Fire in his body, but the alchemy time is more than four hours, which is more than double the time for refining the Huang Ling Pill, mainly because the herbs required to refine the Qingxin Pill are much more than the one required to refine the Huang Ling Pill.

In the end, the success rate of Qingxin Dan is not as high as Huang Lingdan, only 60% of the success rate, that is, each furnace of pills can be harvested about 180 or so Qingxin Dan, as of noon the next day, Tong Chen has refined a total of three furnaces of Qingxin Pill, this week's pills for Wanbao Trading House are enough, but he plans to refine a few more furnaces for backup, after all, he will go to escort the family caravan next week, and it will take ten days and half a month to come back at the latest, and it is a wise choice to refine the pills for Wanbao Trading House next week in advance。

However, these are not the main reasons, the main reason is that if he doesn't continue to refine the pill, if he goes out now, it will definitely make Zhao Lan suspicious, Old Man Qian used to refine a furnace of pills for at least ten days, if he only stays in the pill room for one day and goes out, and then takes out more than 200 pills of Huang Ling Pill, then I don't know what to look like for Zhao Lan.

The next morning, Tong Chen had already refined almost ten furnaces of Qingxin Pill, even if his divine sense was naturally very strong, these ten furnaces of pills were then refined, and the loss of his spiritual power was not ordinarily large, when the last furnace of pills was taken out and put away, Tong Chen felt that the whole person was almost about to collapse, he originally thought that he would sneak out early in the morning to hand over the Qingxin Pill to Wanbao Trading House, and then come back to spend two days in the Dan room before officially going out to hand over the refined Huang Ling Pill to Zhao Lan, but now, he didn't even have the strength to stand, let alone bring it up, so he simply lay down on the spot and closed his eyes and entered the dream。

Tong Chen didn't know that when he was sleeping, a large amount of aura in the air drilled into his body from all directions along the pores on his body surface, constantly cleansing the meridians and internal organs in his body.

The reason why this situation occurs is because alchemy is a kind of practice, Tong Chen refined eleven furnaces of pills in two days, whether it is divine consciousness or spiritual power, it is beyond the established critical point, the last two furnaces of pills can be said to be gritted his teeth and barely completed, from the practice point of view, this is a great challenge to the self, if it is not completed in the end, then it means that his challenge has failed, but if it is completed, it means that his cultivation has taken another step forward on the original basis, a very critical step.