Ancient Daoists and Western Alchemists studied similar subjects, much like modern-day chemists.
However, unlike chemical scientists who solely focus on natural substances underpinning the laws of nature,
ancient Daoists focused on supernatural substances.
Certain materials, when specially treated, could yield solar iron sand.
Forging solar iron sand would then produce solar profound alloy.
This was a supernatural material that surpassed even diamond and titanium alloy in strength.
While Su Fan had learned medicine and martial arts with his grandfather in the mountains, he had heard about such things.
But this was the first time he truly encountered a supernatural material.
Su Fan read through the forging method several times and memorized it completely.
Then he turned to Zhao Chunqiu and asked, "What are your plans next, Old Zhao?"
Zhao Chunqiu replied without hesitation, "Enhance my strength, then take revenge!"
His only reason to live was to take revenge and avenge the blood feud of the Zhao family!
Su Fan nodded slightly, "Then, Old Zhao, continue to stay at Eastern Medicine Company to cultivate and improve. If you have any requests, feel free to tell me."
Hearing this, Zhao Chunqiu hesitated slightly before saying, "Little Friend Su, my cultivation was delayed for over a decade due to my injuries."
"Even if I now strive desperately, it would be hard to reach the late-stage completion of the Vital Breath Realm in a short time."
"Do you have a way to improve my physical condition?"
Su Fan nodded, "Yes, but it requires care akin to meticulous grinding."
"I'll prepare some medicinal tea for you, Old Zhao. Starting today, drink the medicinal tea, eat medicinal meals, and take medicinal baths."
"In as short as three months or as long as six months, you should be able to reach the late-stage completion of Vital Breath Realm."
"At that time, I will go with you to Nippon to take revenge against the Liu Sheng family."
Upon hearing this, Zhao Chunqiu said earnestly, "Good! If I can avenge this blood feud, I shall spend my later years working for you at Eastern Medicine Company, Little Friend Su!"
Zhao Chunqiu understood that Su Fan wanted to strike a long-term exchange of interests with him.
Hearing this, Su Fan was naturally overjoyed.
Furthermore, compared to Zhao Chunqiu's enemies, his own foes were even more troublesome.
Recently, he had come to understand more about Palatia Castle.
Palatia Castle's influence was among the top twenty globally.
Globally, only nineteen forces could compete with Palatia Castle.
Although Zhao Chunqiu's enemies were also formidable, they were not as extreme.
He had Chen Hanqing investigate; currently, the Liu Sheng family should have exactly two martial artists in the late Vital Breath Realm.
Once Zhao Chunqiu upgraded to the late-stage completion of the Vital Breath Realm, no matter how much the opponents improved, he and Zhao Chunqiu could each take down a Liu Sheng family expert.
After discussing future matters with Zhao Chunqiu, Su Fan also talked about a current matter.
"Old Zhao, could you forge some cold weapons made of solar profound alloy for me?"
Su Fan thought back to his previous life-and-death struggle with Howard and others when he had been unarmed.
Back then, if he had a divine weapon in hand, things wouldn't have been so troublesome.
Of course, one must not fight to the death during a normal sparring session.
But in a life-and-death fight where the sole purpose is to kill the opponent, there's no need to fight unarmed.
Among his inherited Tai Chi knowledge was the art of the 'Tai Chi Thirteen Swords'.
Zhao Chunqiu nodded readily, "Yes, I also want to forge some handy weapons myself, for when it's time to sever the heads of my enemies in revenge!"
"However, you'll need to prepare the materials and the facility for refining the solar iron sand, Little Friend Su."
Su Fan nodded, "Just find a suitable place at Eastern Medicine Company."