After analyzing the situation clearly, the next step is to try to increase the speed of the light point movement, so that there is more powerful energy to push the impurities out of the stool.

However, the difficulty is how much it should be increased, if the energy is small, it is useless, and if it is too large, it will explode and be scrapped.

Lin Xuan tried to increase little by little, the light spots around the impurities became denser and denser, and finally, the impurities began to move again, Lin Xuan's movements became more careful, manipulating the impurities to be discharged little by little......

About an hour later.

"Whew!"

Lin Xuan was lying on the bed, looking tired, his clothes had been completely wet with sweat, this process of purification was more tiring than a day of continuous meditation and cultivation.

However, there was a hint of relief at the corner of his mouth, Lin Xuan moved his right hand to his eyes, spread his palm, and there was a small pill in it, exuding a refreshing taste.

Medium-grade marrow washing pill!

Although he had never seen it, Lin Xuan had already seen the exact description from the annotation of the pill, the color and appearance, exactly the same as the one recorded in the book, a genuine medium-grade pill.

Its surface is light blue, and the medicinal fragrance is far stronger than that of the lower grade pill, you must know that in the cultivation realm, alchemy is a highly skilled work, even if it is the lower grade pill, the success rate is only fifty or sixty percent, and the success rate of the middle grade pill is less than one-fifth, that is to say, if you want to refine the middle grade pill and prepare the five furnace materials, there will often be four furnaces scrapped, and this is still a very high-level, experienced alchemist, such a luxurious behavior, only a few big factions can afford it, and a small sect like Piaoyun Valley does not have the strength to refine the middle grade pill at all。

Theoretically speaking, a Zhongpindan can be exchanged for the same kind of ten lower Pindan, but in fact, there is no price at all, take the Cleansing Pill as an example, although the Lower Pindan, although the Lower Pindan, there are always a lot of various sects, but the Zhongpindan is only available to a few major factions, and the quantity is very small, and it is left for genius disciples to take when they rush to the level.

This shows how precious Zhongpindan is!

After playing with the elixir in his hand and thinking about the information of Zhongpin Dan in his mind, Lin Xuan decided to try its medicinal effect himself.

Getting up from the bed, Lin Xuan pulled a futon and sat down cross-legged on the ground, and put the light blue elixir in his hand into his mouth, which melted in his mouth.

Then he sank his divine consciousness into the dantian and began to refine, and soon, the medicinal power was dissipated, and a majestic heat was emitted in the dantian.

Unlike the case of taking multiple pills at the same time, although the heat generated in that case is also hot, it is very hot, making people feel like they are in a furnace, which is very uncomfortable.

The feeling after taking Zhongpintan is completely different, although the heat is strong, the temperature is moderate, and it feels like a hot spring.

Because the impurities are less than those of Xia Pindan, the medicinal power is more pure and more vigorous.

Although there were also some sporadic records in the "Commentary on the Pill", but the personal experience was completely different after all, Lin Xuan's heart was happy but his mind did not fluctuate at all, and he concentrated all his divine consciousness and devoted himself to the refining of medicinal power.

Gathering the spiritual power in the dantian, compared with the scene at the first layer of the spiritual period, the spiritual power at this moment has undergone earth-shaking changes in both quantity and quality.

Originally as thin as a hair, each one is now the thickness of a matchstick, and the color is much darker, it used to be almost white and transparent, with only a little bit of cyan, but now it is almost pure green.

It quickly gathered into a stream of spiritual power, and then manipulated it to move in the eight veins of the Qi Sutra, mixing with the medicinal power of the Zhongpindan.

This process is very important, to put it simply, it is to nourish the spiritual power with the refined elixir.

Just as the roots of the plant absorbed sufficient nutrients, the spiritual power became stronger, and then Lin Xuan manipulated it to make a big Zhou Tian cycle.

I did it nine times!

......

When Lin Xuan finished his efforts and stood up from the ground, it was already noon, and the time for refining medicinal power this time was much longer than taking three lower grade marrow cleansing pills at the same time before, and of course, the effect was more obvious.

After checking it with his divine sense, Lin Xuan felt that the spiritual power in his body had increased significantly, which was very different from the weakening of the medicinal effect of the lower grade pill after practicing the fourth layer of exercises.

In other words, the medium-grade marrow cleansing pill can indeed meet the requirements of one's own cultivation.

Through personal testing, Lin Xuan made the above judgment, but there was still a problem in front of him, the medium-grade marrow cleansing pill was very difficult to refine.

After this half a year, Lin Xuan has already gained a lot of experience in the use of blue light spots, and the purification of the lower pindan is also handy, but the middle pindan ......

To be honest, the one he took just now was also a fluke and successfully purified, and if he did it again, Lin Xuan was not sure, of course, this did not mean that he could no longer purify the Zhongpin Dan, but that it was very time-consuming and energy-consuming, and the success rate was low.

For example, now Lin Xuan can purify an entire bottle of Waste Pill in a day and a night, and the success rate is higher than one-third, without resting, the Xinghai in his body can already support the purification of six or seven Lower Pill in a row.

But Zhongpindan, the current volume of Xinghai, does not rest, at most it supports purification of one piece, and it is easy to fail.

In other words, you can make a mid-grade pill by yourself, but the efficiency is very low, and in this case, your cultivation progress will definitely be affected and reduced.

What to do?

Lin Xuan lay on the bed and began to think, and after a moment of silence, he clapped his palms and decided, he still wanted to purify the Zhongpin Dan.

The reason why I made such a choice was because I continued to rely on taking the lower pindan to cultivate, and the effect was already very low, and if I wanted to break through the bottleneck, I didn't know what year and month I would have to wait for.

And purify the Pindan, it will take more time for the time being, but people do things, the vision should be a little longer-term, the so-called practice makes perfect, when I just started to purify the Pindan, the success rate is not very low, step by step is difficult, but what happened later, very casual.

Therefore, I can't have the psychology of retreating because Zhongpindan is difficult to purify, and Xiuzhen will encounter all kinds of difficulties, what is this?

It's good to find a way to overcome it.

I believe that with continuous practice, the efficiency of self-purification of Zhongpindan will become higher and higher, and with its miraculous medicinal effect, the speed of cultivation can be a thousand miles a day.

That is to say, in the long run, it is absolutely cost-effective to spend time now practicing mastering the purification of Zhongpindan.

After carefully analyzing the pros and cons of the matter, Lin Xuan already had a new plan in his heart for his future cultivation and continued to work hard.