Longevity: Never leave the mountain until you are invincible

Class C Alchemy Room No. 18.

Boom!

The stone door opened, and Sun Bingwen walked out of the alchemy room with a happy face, holding a bottle of pills in his hand, which contained the Gathering Spirit Pill he had refined.

"Congratulations to Master Sun for successfully refining the Gathering Spirit Pill and becoming a Class B alchemist."

The alchemy apprentices and medicine boys who were waiting on the side saw this and came forward to congratulate him.

"Congratulations."

Sun Bingwen couldn't hide his joy and gave a bottle of Jingqi Pill to the alchemy apprentices and medicine boys.

"Is Master Zhou not out of retreat yet?"

Sun Bingwen looked at the Class B Cave No. 3 with the stone door tightly closed and asked.

"Master Zhou is not out of retreat yet."

An alchemy apprentice answered.

Sun Bingwen nodded, not caring too much.

It is common for an alchemist to retreat for several months to refine a pill.

The Yellow Dragon Pill is more difficult to refine than the Gathering Spirit Pill, so it is reasonable for Chu Chen to retreat for a longer time.

He just regretted that Chu Chen could not attend the celebration banquet for his promotion to Class B alchemist.

Two months later, one morning, when Sun Bingwen came to the Alchemy Pavilion, he noticed that the stone door of Class B No. 3 Alchemy Room had been opened, and several alchemy apprentices and medicine boys were standing outside the alchemy room.

"What happened?"

Sun Bingwen frowned and asked.

"Master Sun."

When several alchemy apprentices saw Sun Bingwen, they bowed and told him the good news.

"Master Zhou came out of retreat this morning and successfully refined the Yellow Dragon Pill. He has returned to the cave to rest."

"Master uncle refined the Yellow Dragon Pill, and we should congratulate him."

Hearing this, Sun Bingwen's eyes lit up and he stopped refining pills.

He immediately went to Chu Chen's cave.

But he saw that many cultivators gathered outside the cave, including people from the Alchemy Pavilion and casual cultivators from the market, all of whom came to congratulate.

Every top-class alchemist has a very high status. If you can establish some friendship with them, you will get a lot of benefits.

But what surprised everyone was that no matter how they touched the formation outside the cave, Chu Chen did not respond.

"Uncle Zhou has been in seclusion for several months, consuming countless energy, and just refined the Yellow Dragon Pill. He may still be resting at this moment."

Seeing this, Sun Bingwen said loudly.

"Master Sun is right. We will not disturb Master Zhou for the time being. We will come to congratulate him another day."

Seeing this, all the cultivators had no choice but to leave.

But.

For several months, Chu Chen did not show up.

This made Sun Bingwen a little worried. He told Taoist Qingrong about this. Taoist Qingrong also felt that something was wrong, so he quickly asked the market law enforcement team to take action and open the formation outside the cave.

The cave was empty, and no one had left.

...

Changyou Mountains.

A famous mountain range in Hanbei Country, spanning hundreds of miles.

After Chu Chen left Canglan Market, he came to Changyou Mountains, preparing to find a spiritual place for retreat.

To break through the foundation-building period, you need a spiritual place with abundant spiritual energy. Insufficient spiritual energy may lead to failure of breakthrough.

Hanbei Country is closer to the center of Tianhuang Continent than Da Yan Country and Barbarian Grassland, and the concentration of spiritual energy is also richer than Da Yan Country and other places. There are many spiritual places in the mortal world, and even medium-sized spiritual places exist.

It is not difficult to find a spiritual place in Hanbei Country.

"Some cultivators have explored Changyou Mountains and found traces of monsters, which shows that there are spiritual places in Changyou Mountains."

Long before refining the foundation-building pill, Chu Chen collected areas where spiritual places may exist in the mortal world of Hanbei Country.

Monsters are the same as cultivators. They rely on the existence of spiritual places. Where there are monsters, there are naturally spiritual places.

Moreover, the monsters in Changyou Mountains are not powerful. There are no foundation-building monsters. Most of them are monsters below the ninth level of Qi training.

Chu Chen used the Qingtian Sense Spiritual Mirror to explore the area with abundant spiritual energy. After dozens of days, he finally found a medium-sized spiritual land.

This medium-sized spiritual land is located in a remote location at the bottom of a deep pool in a valley. It is extremely difficult to find. If Chu Chen did not have the Qingtian Sense Spiritual Mirror, he might not be able to find this place.

This spiritual land was occupied by a snake demon at the ninth level of Qi training, and Chu Chen easily killed it.

After killing the snake demon, Chu Chen dug a cave at the bottom of the deep pool as a place for retreat.

Then, he took out a set of array equipment, which was the Qiankun Illusion Killing Array bought from a master of array formation in Canglan Market.

In order to break through the foundation-building period, he made a lot of preparations, and this Qiankun Illusion Killing Array was one of them.

The Qiankun Illusion Killing Array has the power of illusion array and killing array, which can conceal the existence of the cave. If someone accidentally breaks into it and activates the killing array, even a cultivator at the twelfth level of Qi training will not be able to escape easily.

This Qiankun Illusion Killing Array is also very expensive, and it cost Chu Chen 40,000 low-grade spirit stones.

After setting up the Qiankun Fantasy Killing Formation, Chu Chen settled down and activated the gathering power on the Qingtian Sensing Spirit Mirror.

Buzz~

The spiritual energy in the spiritual land gathered and filled the three-meter area around Chu Chen.

"The concentration of spiritual energy is not inferior to the second-class caves in Canglan Market, which is enough for building the foundation."

Chu Chen felt the spiritual energy in the air and smiled.

Then.

He began to polish his magic power and adjust his body state to prepare for the breakthrough.

If it were a cultivator of the same age as Chu Chen, he would have little life at this moment and could only fight hard to break through.

Chu Chen had plenty of time and could completely adjust his body state to the best before breaking through.

Half a year passed in a blink of an eye.

One day.

Chu Chen was practicing the Changsheng Gong, and suddenly a palpitation surged in his heart, and the magic power in his body surged like a tide.

In an instant, he had an epiphany that the time to break through the foundation had come.

Immediately took out the foundation-building pill from the Qingtian Sense Spirit Mirror, as well as Yimu Lingdan and other healing pills to recover from injuries in case of failure to break through.

"Hula!"

Chu Chen pushed the Changsheng Gong to the extreme, and a storm of spiritual energy instantly rose in the cave.

Countless spiritual energy gathered towards him, pouring into his body from the Baihui point on the top of his head.

A quarter of an hour later, Chu Chen's face showed a trace of pain. The mana in his body had already filled the meridians all over his body, and his dantian was like a blown-up balloon that could be blown up at any time.

If he continued to absorb spiritual energy, the final result would only be that his dantian would be broken, and the whole person would explode and die.

"Refine!"

Chu Chen raised his head and swallowed a foundation-building pill into his stomach.

Boom!

He felt as if he had swallowed a fireball, and a huge amount of medicinal power burst out and merged into the meridians and dantian in the body, strengthening the carrying capacity of the meridians and dantian.

At the same time, under the effect of the medicinal power of the foundation-building pill, the mana in the body was constantly compressed and began to transform from gas to liquid.

This is a long transformation process.

One foundation-building pill is not enough to support the entire process. When the medicinal power of one foundation-building pill is consumed, Chu Chen swallows another foundation-building pill, and so on, until the medicinal power of three foundation-building pills is completely consumed.

At this time, the aura emanating from Chu Chen's body suddenly shook, as if breaking through a certain barrier and breaking through to a new level.

Boom!

A spiritual energy storm that is ten times larger than before swept through the cave.

The entire cave was stirred into a mess, and it was even about to spread outside the cave.

The Qiankun Fantasy Killing Array was activated, blocking the strange phenomenon, so that this strange phenomenon did not spread outside the cave and attract the attention of others.

After a long time, the spiritual energy storm gradually subsided, and the aura emanating from Chu Chen also returned to calm.

Foundation-building period, success!