Ding Fan knew that this ancient formula was not something that could be obtained casually. For an alchemist, acquiring an ancient formula was undoubtedly a stroke of great luck, but trying to restore this ancient formula was evidently the most painful thing for an alchemist. After all, restoring an ancient formula was extremely difficult, a fact all alchemists were well aware of.

The other party had spent half a year restoring the quantities of eighteen spiritual materials, which was already quite commendable. Ding Fan acknowledged the other party's alchemic talent but wasn't overly shocked. He remembered when he once restored an ancient formula with forty-eight spiritual materials, it took him about half a month back then, which clearly was already quite exhausting for Ding Fan.

Ding Fan deeply experienced that feeling, describing it as a pain mixed with joy, as the sense of achievement upon restoration left a lasting impression on him.

The Eight Treasures Pill comprised of sixty spiritual materials was evidently a bit more complex than the ancient formula Ding Fan had restored previously, but not overly so.

At this moment, Qing Feng, the eldest senior brother of the two children, hesitated with the spiritual materials in hand, unsure of the right amount to add. A slight mistake would declare the alchemy process a failure, wasting the precious materials in the alchemy cauldron. If it failed, it could potentially cause the cauldron to explode. Qing Feng knew many explosions had already happened before.

He was well aware the alchemy cauldron had a certifiable limit. Once surpassed, the cauldron would undoubtedly be ruined.

The thought of such a dire consequence made Qing Feng's forehead drip with sweat, contemplating nervously.

"Add three units of 'Hulu Spirit Grass'! At the same time, complement it with 'Lotus Seed Grass' for assistance!"

At that moment, a voice reached Qing Feng's ears, the speaker evidently was Ding Fan.

Qing Feng kept replaying Ding Fan's words in his mind, and moments later felt immense joy, spontaneously exclaiming:

"That's it!"

Qing Feng then followed Ding Fan's instructions, pinching a small piece of 'Hulu Spirit Grass' and placing it into the alchemy cauldron. At the same time, he also added a handful of 'Lotus Seed Grass'. Instantly, a faint green medicinal fragrance emanated from the cauldron.

Evidently, the quantity of spiritual materials added was perfect, allowing the materials in the cauldron to fully integrate. Having ascertained the correct amount of one spiritual material, Qing Feng was filled with excitement, knowing well how challenging it was. To determine the right amount without a single explosion was thrilling to him.

Qing Feng knew how many times he had caused explosions trying to figure out each material's amount, knowing the cauldron was nearing its limit after each explosion, reducing its viable uses with every failure.

Feeling quite elated at succeeding with one spiritual material, Qing Feng intended to halt there. After all, he had only prepared thoroughly for this single material this time. Evidently, achieving success even in this was not easy, planning to study the rest for a while before further attempts.

However, as Qing Feng was about to stop, Ding Fan spoke up again:

"Add five units of 'Rolling Pearl Grass', and two 'Drunken Clear Snakes'! Simultaneously intensify the alchemy fire, inject mental power, concentrate your will!"

Qing Feng, about to cease, was startled by the voice once more. Earlier success in ascertaining the first material's amount followed that voice's guidance, now hearing it again filled him with excitement.

Rather than stopping and withdrawing the fire, Qing Feng meticulously examined Ding Fan's words, and moments later, his eyes brightened.

"Indeed correct!"

Spontaneously, Qing Feng exclaimed with excitement. Then, he placed the materials into the alchemy cauldron according to Ding Fan's instructions. Moments later, the medicinal fragrance in the cauldron intensified, permeating the entire estate, clearly sensed by everyone present.

Ding Fan too couldn't help but sense the fragrance, finding it incredibly refreshing. He realized that if the Eight Treasures Pill were successfully refined, it would undoubtedly be extraordinary.

The fragrance alone was mesmerizing, let alone the pill itself, surely its effects would be even more wondrous!

Witnessing this scene, Qing Feng was utterly astonished. He hadn't expected another success. Today was incredibly fortunate, as if blessed by divine help! To accurately deduce two materials' amounts in a row was simply astounding! Qing Feng seemingly still found it hard to believe the scene before him, evidently too shocking!

The two children beside Ding Fan, hearing his words and seeing the fragrance emanating from the cauldron, were clearly stunned by Ding Fan's successful guidance of two spiritual materials. They were utterly amazed, never expecting Brother Fan to be adept at pill refinement.

And so skillful too, given the ancient formula their elder brother was working with, yet Ding Fan, from afar at the doorway, accurately gauged the materials as well — it was simply unbelievable!

The astonishment wasn't isolated to just the two children; He Qianyao, though not well-versed in alchemy, observing the reaction of the children's elder brother, knew the attempt guided by Ding Fan was likely a success, rendering her equally astonished by Ding Fan.

Ding Fan's unexpected expertise in alchemy left everyone utterly shocked.

Observing the state of the alchemy cauldron and smelling the medicinal aroma, Ding Fan clearly realized that the two spiritual materials had succeeded. Intrigued, Ding Fan continued:

"Grind the 'Hundred Seed Flower' into powder and add three liangs!"

Upon hearing this, Qing Feng felt a rush of thoughts in his mind, his eyes filled with excitement. He picked up a handful of 'Hundred Seed Flower' and firmly grasped it. A faint True Qi enveloped Qing Feng's hand, and in an instant, the 'Hundred Seed Flower' turned into powder, which was then poured into the alchemy cauldron.

Qing Feng could accurately measure the weight with just a gentle touch, which Ding Fan noticed. It was evident to Ding Fan that Qing Feng was a seasoned alchemist, executing his instructions with precision. Ding Fan felt elated by Qing Feng's adeptness.

Neither Ding Fan nor Qing Feng noticed a white-haired elder dressed in a white robe who had been standing behind them for quite some time. The two children were equally unaware of the elder's presence. Once they noticed him, they were taken aback.

With a look of utmost respect, the two children prepared to greet the elder, evidently recognizing him as their master. However, as they were about to pay their respects, the elder gestured for silence, clearly not wanting to disturb Ding Fan and Qing Feng.

The elder had heard Ding Fan's earlier words. He was incredibly astonished, not expecting such a brilliant alchemist, especially someone so young. The elder recognized that Ding Fan was not even close to the alchemy cauldron.

Ding Fan made his judgments purely based on the scent of the medicinal herbs and his observation of the fire, yet his accuracy in estimating the quantity of the spiritual materials was astonishing. The elder's heart was filled with amazement.

The elder could deduce the approximate amount of spiritual materials himself; however, when it came to the 'Hundred Seed Flower,' his estimation was slower than that of the young man, leaving him utterly awestruck and unable to believe his own eyes.

Seeing their master's serious expression, the two children were deeply shocked. They couldn't recall any situation that had left their master looking so gravely astonished. Clearly, their master was also moved by Brother Fan's alchemical skills.

After Qing Feng added the 'Hundred Seed Flower Powder' to the alchemy cauldron, the cauldron emitted a series of crisp crackling sounds, indicating a positive reaction.

Soon, the medicinal fragrance from the cauldron changed to an even richer, more intense scent, signifying that the third spiritual material was correctly used.

Both Qing Feng and Ding Fan realized this, their excitement growing. The joy of restoring the ancient formula was immense, a sense of accomplishment beyond ordinary comprehension.

Observing the changes within the alchemy cauldron, the elder was left in awe. The 'Hundred Seed Flower Powder' had been used correctly, confirming the youth's genius!

Despite his amazement, the elder remained silent, eager to see how accurately Ding Fan could estimate the quantities of the spiritual materials.

Ding Fan, feeling a surge of joy from their success, did not mention any more spiritual materials. Instead, he instructed Qing Feng:

"Let's stop here. Cease the alchemy fire abruptly and immerse the cauldron's contents in Hundred Spirits Water to preserve the medicinal efficacy of the spiritual materials."

Qing Feng was taken aback by this suggestion. It was his first time hearing about preserving refined spiritual materials with Hundred Spirits Water. Could this really work? It was unheard of. Qing Feng hesitated.

He turned his head, trying to locate the source of the voice. It clearly wasn't his master's usual tone, but who else could be such an adept alchemist?

Seeing Ding Fan, Qing Feng was completely stunned, shocked by the realization that someone even younger than himself could possess such skills.

Qing Feng, wide-eyed with astonishment, gazed at Ding Fan. Meanwhile, Ding Fan remained calm, saying:

"If you wait another half an hour without preserving the cauldron, you'll have to start from scratch next time."

Qing Feng was taken aback by Ding Fan's words. He knew that whenever he experimented with the spiritual materials' proportions, it often required him to start anew, with success proving elusive at times, a process that was both time-consuming and frustrating.

Having never heard of any method to preserve an alchemy cauldron, Qing Feng was both amazed and skeptical about Ding Fan's assertion.

"Do it!"

A voice, ancient and commanding, suddenly addressed Qing Feng. He realized it was his master speaking!