The letter did not mention the details of Zhang Tieshan's elixir formation.

For example, why did I only get a low-quality Crystal Condensing Pill?

Based on Zhang Tieshan's military exploits, worth, and connections within the sect, it was expected that it would be a genuine Crystal Condensation Pill.

The reason may not be disclosed in Zhao Siyao's letter.

"The quality of the finished pill can theoretically be concealed."

Lu Changan cultivated to the peak of pill formation in his previous life and knew many secrets.

For example, if Lu Changan achieves a high-quality true elixir in the future, he can disguise it as a mid- to low-quality true elixir through the Qi-condensing ability of Evergreen Gong.

But this situation does not apply to Zhang Tieshan.

There is an obvious difference between the true elixir and the fake elixir, as well as the visions of heaven and earth when the elixir is condensed, and it is not easy to hide them.

Zhang Tieshan was not secretly forming elixirs outside.

Instead, the elixir is condensed in the third-level spiritual veins of Jinyun Valley in full view of everyone. It is difficult to hide this process from the true elixir elders of the sect.

Therefore, Lu Changan basically concluded that Zhang Tieshan formed a gray pill and could not fake it.

After pondering for a long time, Lu Changan had a thought:

"Could it be that he used an extremely dangerous method of converting elixirs?"

In the previous life of Dakun, some large sects at the Nascent Soul level mastered the secret method of converting broken pills into liquid.

The essence of elixir formation is to condense the liquid mana in the foundation building stage into a solid inner elixir.

This process is not completely irreversible.

If you are not satisfied with the completed elixir, you can theoretically break the gray elixir and return it to the liquid mana in the foundation building stage.

Some ancient sects have a secret method that is not passed down. Through this method, the mana can be purified and the elixir can be re-condensed. This method can even slightly improve the quality of the next elixir.

However, this method is almost legendary because the conditions are very harsh!

The process of turning elixir into liquid is extremely dangerous and extremely unstable.

According to Lu Changan's understanding before time travel, the inner elixir of the alchemy monk is equivalent to a small nuclear bomb.

If there is no real secret method of converting elixirs, ordinary monks will 90% explode and die if they break elixirs into liquid.

In his previous life, Lu Changan only had access to an incomplete version of the secret method of alchemy that had been circulated outside. Without any external help, the success rate was less than 10%, and he had a narrow escape.

With such a risk, Lu Changan had no intention of trying it.

Those ancient sects have more than 30% confidence in mastering the secret method that is not taught.

And with the personal protection of the Nascent Soul Lord and the precious secret medicine, the success rate will be more impressive.

"If this is the case, Zhang Tieshan probably has a higher-level secret method of elixir transformation."

Lu Changan's heart skipped a beat.

He has a long lifespan and is good at healing injuries with the Evergreen Skill. If he has a reliable secret method of converting elixirs, his error tolerance rate will naturally be higher than that of other monks.

The return of the elixir to the liquid will severely damage the monk's vitality and face varying degrees of backlash.

This will affect the foundation, require a lot of time to adjust, and consume a lot of precious resources.

When Guan Qiaozhi was building the foundation, Lu Changan helped protect the law and tested it secretly.

The backlash of Guan Qiaozhi's failure to build the foundation used the secret technique of Changqing Gong to consume a small amount of lifespan, heal the injury in time, and avoid damage to the foundation.

It only takes a few months to rest and regain energy before the next impact.

Lu Changan once thought about whether this method could be applied to forming pills?

Is the quality of the finished pill poor?

Then come back again and again through elixirs!

Theoretically speaking, as long as you live a long life, you will eventually have the opportunity to wash out high-quality pills.

The premise of the above assumption is that there is a good secret method for converting elixirs.

Make sure there are no mistakes every time when the elixir is transformed and the liquid is returned, and your life is safe.

"Hey! Even though Zhang Tieshan has the top secret method of transforming elixirs, Jinyun Valley does not have the Nascent Soul Lord to protect him, so the overall success rate is not high."

Under this assumption, Lu Changan discovered a doubt.

The level of the secret method of converting elixirs is one thing, external force is also important.

If you get the legendary "yin and yang water", you can safely transform into elixirs even without the protection of Nascent Soul Lord.

If Zhang Tieshan is really planning to use the elixir method, Lu Changan speculates that he will have another chance.

"It seems that Master Tianfeng's pill-forming Xiaoqing is worth a visit."

Lu Changan decided to find out the truth.

…

Zhang Tieshan's Xiaodan Festival will be held in two months.

It is said that only a small group of classmates and friends were invited, without any fanfare.

Lu Changan arrived at Jinyun Valley one day early.

In front of the mountain gate, I met some celebrants, several of whom came uninvited to pay a visit to Master Tianfeng.

"Senior brother from the sect, can you be accommodating and help deliver the message? The two of us have fought side by side with Zhenren Zhang and jointly eliminated wanted persons. We have a very close relationship!"

"We have a strong relationship? Why didn't Mr. Zhang send you an invitation letter?"

The disciple guarding the gate sneered, as if looking at a clown.

"Zhenzhen Zhang's elixir-forming Xiaoqing will not be disclosed to the public, only invitations will be recognized!"

Lu Changan was not surprised when he saw this scene.

Zhang Tieshan has been practicing for more than 120 years and knows or has interacted with countless monks.

"Master Lu Fu, please come in."

The disciple guarding the gate knew Lu Changan, took a look at the invitation, and warmly invited him to enter the gate.

"Master Lu? He seems to be the Turtle Talisman Master from Wu Qi Mountain?"

"I heard that this man and Zhenren Zhang have known each other since they were young and have had a friendship for more than a hundred years."

"This Master Lu is quite famous. Decades ago, when I was in the Qi refining stage, I heard that he was a late bloomer and was building foundations at an advanced age."

"It turns out he is our senior."

Looking at the back of the man in white, most of the monks discussing in front of the mountain gate showed some respect.

…

In the hinterland of Jinyun Valley Mountain Gate, on a mountain peak where the third-order spiritual veins are located, you can see an ancient mansion.

This is Zhang Tieshan's new dojo, and the aura environment far exceeds that of Wu Qi Mountain.

"Master Lu Fu, there are a lot of guests today. The master is currently meeting two real people, so we really don't have time to spare."

A young man with a tough face and wearing a snow-green robe raised his hands and apologized.

The young man's name is "Yu Qinghai". He is in the early stage of foundation building. He was a disciple that Zhang Tieshan accepted in the sect thirty years ago. His qualifications are average and his sense of presence is not strong.

Lu Changan and Yu Qinghai only met once or twice, unlike Zhao Tan'er and Lin Lu before, who had a closer relationship.

"It doesn't matter, today is not the day for the Dan Dan celebration. Just take the time to inform the commander."

Lu Changan nodded.

"Definitely! Master Lu Fu will be able to see his master tomorrow. Later, I will arrange a guest room on the mountain for Master Lu Fu."

Yu Qinghai spoke at the same time.

Two more visitors came to the bottom of the mountain, one of whom was in the late stage of foundation building.

Yu Qinghai had no time to spare, so he recruited a maid in the Qi refining stage to arrange a place for Lu Changan.

"Qinghai, you go and do your work first. I'll visit fellow Daoist Zhao at his house."

Lu Changan had no complaints.

Zhang Tieshan formed the elixir, and there were many people celebrating, so the master and the disciple were too busy to do it.

Lu Changan can understand the poor reception.

From foundation building to elixir formation, a monk's status will make a qualitative leap.

In the huge Jinyun Valley, at its peak, the number of true elixir monks could not exceed the number of two palms.

During the low period, there were only two or three True Alchemy monks.

False Dan Zhenren is not at the top level in Jinyun Valley, but he is already among the top ranks.

Whoosh!
To be continued...