Su Chen looked through the book of spiritual marrow bought from the night market.

This spiritual wise book volume describes the spiritual wise classification and grade classification of immortals in the Qi Refining Stage.

The spiritual marrow in the Qi Refining Stage is the first small spiritual bone marrow on the neck and spine of the immortal cultivator in the Qi Refining Stage. It is used to transform the spiritual energy of heaven and earth into the vital energy that can be absorbed by the soul of the immortal cultivator and inject it into the Niwan Palace.

The most common ones are the five elements of gold, wood, water, fire, earth, and the slightly rare ice, wind and thunder. The spiritual marrow may be single-type attributes or multiple-type attributes.

There is a rare rare spiritual marrow, but it is hard to see one of the thousands of immortal cultivators. It is not that the rare spiritual marrow is powerful, but the effect is special and incredible.

Whether the spiritual marrow is powerful depends mainly on its grade. It is roughly divided into three grades: upper, middle and lower.

If you divide it carefully, it will be the potential between one to one hundred points.

From one to nine o'clock, they are not among the lowest grades and are a disabled spiritual marrow. If you are lucky, you may become a cultivator in the Qi Refining Stage, but you will be wandering in the first and second levels of the Qi Refining Stage in this life, and you will have no hope even in the middle stage of Qi Refining Stage.

From ten to twenty-nine o'clock, it is the lower-grade spiritual marrow. It is worse. The hope for this life is to survive among the middle-stage qi refining cultivators.

From 30 to 59 o'clock, they are all middle-grade spiritual marrows. Whether they can survive depends entirely on hard work and the opportunity to cultivate immortality in the front line.

From 60 to 79 o'clock, it is the best grade. Cultivators with the best grade spiritual marrow practice faster and can cultivate to the late stage of Qi refining under normal circumstances. Whether the foundation can be built depends on the opportunity.

Above 80 points, it is the best, and it is very rare among immortal cultivators. It is normal for a generation of immortal cultivators to see one of them in the entire Chaoge Fairy City.

The level of spiritual marrow directly limits the efficiency of cultivators in the transformation of spiritual energy into spiritual energy, so it is also called the spiritual marrow bottleneck.

Even in the Qi Refining Stage, the five major immortal sects in China will be directly included as official disciples.

This is just the first spiritual corpus of immortals in the Qi Refining Stage.

After becoming a cultivator in the foundation-building stage, the second spinal cord of the cervical vertebra will break through and become a spiritual marrow, the more cultivators the higher the level of spiritual marrow, the more spines will turn into spiritual marrow.

There are ancient legends in the world of immortal cultivation. It is said that reaching the realm of flying immortals, one can turn the thirty-three spines of a whole spine into spiritual marrow together, which is incredibly powerful.

Master Lu had previously told Su Chen that the spiritual marrow was divided into upper, middle and lower grades, which was too general and rough. Perhaps he saw that the spiritual marrow that Su Chen was a middle grade, so he didn't say more carefully.

The identification of spiritual marrow potential requires special spiritual identification techniques to be identified.

If there is no identification method, there is also a simple way to know whether your spiritual marrow is of good or bad. That is, to see how many bowls of spiritual rice you can eat and whether the absorption efficiency is high, you will immediately know whether the spiritual marrow is good or bad.

A cultivator in the Qi Refining Stage starts with the spiritual marrow of 30 o'clock and can digest a bowl of spiritual rice cooked in the Spirit Valley in one day.

After that, every five points of spiritual marrow can absorb the spiritual energy of one bowl of spiritual rice. A big-bellied man who eats three meals a day has a spiritual marrow qualification of over 60 o'clock, which is the top-grade spiritual marrow.

The only way to change the potential of spiritual marrow is to take marrow cleansing pill.

This is a secret method developed by ancient immortal cultivators. It can be used to refine the spiritual herbs in the deep mountains and clean the marrow and bones. It can be a revelation effect and can change the bottleneck of the spiritual marrow of the monk.

After reading the Book of Spiritual Marrow, Su Chen was very surprised and understood the situation of Spiritual Marrow.

"It turns out that the cultivator in the Qi Refining Stage only has one spiritual marrow! After building the foundation, he will transform into a second spiritual marrow. If the entire spine is thirty-three of them are transformed into spiritual marrow, how powerful it is! I am afraid that in the middle of swallowing and spitting, the spiritual energy like Taotao River can instantly turn into vital energy."

Su Chen was amazed.

He sat cross-legged, meditated for a short while and adjusted his condition, then opened his mouth to swallow the golden crystal clear marrow washing pill.

Not long after, the marrow-cleaning pill was in the abdomen and melted into a golden force of medicine, flowing in the body, and finally completely absorbed on the first spine column of the cervical vertebra to reveal the spiritual marrow.

Only then did Su Chen see clearly.

This is the spiritual marrow of the Qi Refining Cultivator, and it is also the only spiritual marrow at present.

He is the single spirit of wood.

In this spiritual marrow, under the surging power of the marrow-cleaning pill, it began to remove impurities in the spiritual marrow and improve its efficiency in absorbing and transforming spiritual energy.

The process of marrow cleaning is quite uncomfortable.

Like thousands of ants eating bones, biting bit by biting away the impurities in the spiritual marrow, making it more pure.

Su Chen closed his eyes and meditated, his whole body was burning hot, and suddenly he shivered again, sometimes cold and sometimes hot.

Only after an hour did the medicinal power of this marrow-cleaning pill be completely exhausted.

Finally the marrow washing was finished.

Su Chen was already so tired that he was almost exhausted. He was sweating all over, his clothes were muddy and wet, and there was a thin layer of dark black scum on his skin.

The spiritual marrow seemed to have a little impurity and was cleaner.

Su Chen rested for half an hour, recovered from the marrow washing, breathed a sigh of relief, and came out of the bedroom.

When Anu saw Su Chen coming out of seclusion, he had just finished practicing and was covered in sweat and dirt, and quickly burned a large pot of hot water from a wooden basin.

Su Chen quickly burned hot water to take a shower in the wooden basin, cleaned the dirt on his body, and changed into a clean and refreshing dress.

Then he started to have dinner and a meal of Linggu rice.

Su Chen ate very slowly, chewed slowly, and saw how much he absorbed Linggu after washing the marrow.

It took nearly an hour to finish the supper and slowly digest it.

His heart was trembling, and he wanted to cry without tears.

Today, he only digested half a bowl of spiritual rice.

This means that he spent 950 spiritual stones to buy a marrow cleaning pill, which improved the effect of the spiritual marrow by about two points.

Only five points can add a bowl of spiritual rice.

He had to wash the spiritual marrow at least twice or three times before he could increase the amount of a bowl of spiritual rice.

Obviously it is not as easy as Master Lu said. After washing the low-quality products a few times, it becomes a medium-quality product or even a top-quality product.

I saved up two thousand spirit stones in half a year and spent half of it to buy this marrow-cleaning pill, which only increased by two points.

"As soon as you enter the marrow washing, it's as deep as the sea. This pit is too deep and it's bottomless!"

Su Chen couldn't hide his sadness.

No wonder the disciples of the gray-clothed monk Bi family didn't think about using it themselves, but just sold it.

The marrow cleaning pill is a good thing, but the effect of one marrow cleaning is not obvious. How many times do you need to wash it before you can wash out a top-grade spiritual marrow that is above 60 o'clock?

Su Chen tried to cleanse the marrow, but was a little disappointed, but he was very unwilling.

He tasted the taste of marrow cleaning and improved the spiritual marrow a little. He increased from a bowl of spiritual valley to a bowl of a half.

But it is impossible to let him give up cleaning the marrow.

If he does not cleanse his marrow, his cultivation speed will be too slow. It will be too slow for him to survive for thirty or forty years before he can become a late-stage Qi refining cultivator.

If one marrow-cleaning pill doesn’t work, then two, three, five or ten, can always be gradually improved.

Su Chen gritted his teeth secretly and made up his mind.

What he lacks the most now is not the Spirit Valley, nor is it too lacking in spirit stones. This bottleneck of the Spiritual Marrow has strictly limited his absorption of spiritual energy. We must break through this difficulty.

There are no dealers selling marrow-cleaning pills in the night market in Chaoge Fairy City.

Su Chen had to come to the largest spiritual pill pavilion in the city again.

If you want to buy marrow washing pills again, you can only buy the large Lingdan Pavilion in Chaoge City.

The largest in the city is the "Zhou Family Dan Pavilion". The Qi Refining Period spiritual pills are in full and the supply is sufficient. Even a few rare spiritual pills do not have spot stock, and there are channels to purchase goods.

"My fellow Taoist, have you made up your mind and order a marrow-cleaning pill?"

A shopkeeper from the Zhou family said with a smile.

This is the family industry of the Zhou family, and his shopkeeper is naturally a member of the Zhou family.

Last night, Su Chen came to his Lingdan Pavilion to see it and wanted to cleanse the marrow.

But there are too few people who bought the marrow cleansing pill, and there is no stock in the pavilion for the time being. If you want to order, you will have to wait two or three months to purchase the goods from the five major immortal sects.

Su Chen couldn't wait yesterday and did not order it. He met a gray-clothed monk at Chaoge Night Market, so he bought a marrow-cleaning pill directly from him.

"Shopkeeper, can it be cheaper?"

"It's really cheap. This marrow-cleaning pill was purchased from the Immortal Sect. The price of one thousand spirit stones was also set by the five major immortal sects. Our Lingdan Pavilion sells one, and it will only make a difference of dozens of spirit stones. You pay the deposit of two hundred spirit stones first, and I will order one for you to come back."

Zhou's shopkeeper shook his head.

Su Chen had some difficulty making up his mind.

He only had a thousand spiritual stones left in his hand. Although he earned the spirit stones quickly, he worked hard for more than half a year and went to sell the spirit valley and spiritual medicine every day.

If you buy a marrow-cleaning pill, it will be in vain after working hard for a few months. If you buy ten pellets, it will be in vain after two years.

By chance, Su Chen saw a few old alchemy jade slips and some spiritual prescriptions displayed in a counter in the corner of the hall.

Alchemy!

Su Chen couldn't help but be stunned.

He suddenly thought of something that he didn't have to buy ready-made elixirs, and maybe he could learn it himself and practice an alchemy technique.

Whether it is to refine the elixir by yourself, or to sell it after refining the elixir, it is a good business. The profit of the elixir is much higher than that of the Linggu and the spiritual medicinal materials.

"Shopkeeper, show me these alchemy books!"

"This little brother should be a new cultivator in the Immortal City. This alchemy book is of no use to you. You don't have spiritual medicinal materials, no alchemy furnace, and have never learned alchemy techniques from an alchemist to buy this alchemy book. It's just a waste of spiritual stones."

Manager Zhou smiled and advised.
To be continued...