Okay, here is the English translation of the text you provided:

  "Young man, it's best not to speak in absolutes." Wei Gongxun's brow furrowed slightly, clearly displeased.

  "Alright, since my brother-in-law has spoken, let this Dr. He stay and observe as well. I'm sure it will be a valuable learning opportunity for him."

  Seeing his brother-in-law was unhappy, Zheng Shifan didn't press the issue further and quickly backpedaled.

  Lin Yu shook his head with a wry smile. He had heard of Jishitang's skillful physicians, but he had never heard of Jishitang looking down on others. Today was an eye-opener.

  After a moment, Zheng Jiacheng emerged from an inner room. He was wearing a white silk Tang suit, his步伐 steady, his hair white but his face youthful, and his spirit vibrant. He didn't look sick at all.

  "Gongxun, you came too? Please, have a seat."

  Zheng Jiacheng's demeanor was very approachable, but the air of a long-time commander, a regal aura, naturally emanated from him.

  "Which one of you is the grandson of Master Song from Jishitang?"

  After everyone sat down, Zheng Jiacheng glanced at Lin Yu and Song Zheng, his hands continuously rubbing a pair of dark red walnuts.

  "Hello, venerable Zheng. I am Song Zheng from Jishitang. My grandfather sent me to examine you. Before he left, he instructed me that although you offered a ten-million-yuan fee, we at Jishitang will give you a twenty-percent discount."

  Song Zheng said with a smile, a hint of pride in his demeanor. Two million, just like that! That's how generous Jishitang is.

  "Good, truly a hero comes fromjuvenile. Since Master Song has sent you, you must have extraordinary abilities. Rest assured, as long as you cure my illness, you will be paid in full, not a single cent less."

  Zheng Jiacheng declared loudly. Such a small sum was insignificant to him.

  "Dad, I've also invited a doctor for you, a young miracle doctor. His medical skills are also verycraftsmanship." Wei Gongxun quickly interjected, recommending Lin Yu.

  "Good, the new wave surpasses the old, it's the era of the young now. I'll trouble both young friends later." Zheng Jiacheng said with a smile and then instructed the butler to serve tea.

  "Venerable Zheng, aren't we starting the examination now?" Song Zheng asked in confusion, seeing that Zheng Jiacheng didn't seem inclined to receive treatment.

  "Well, if we examine now, I'm afraid we won't find anything." Zheng Jiacheng said with a helpless smile. "I've had doctors examine me before, and after the examinations, all the indicators were normal. They couldn't diagnose anything. Only when I have a headache can the illness be identified."

  "Oh? So strange?" Song Zheng was a little puzzled and then walked over to Zheng Jiacheng, asking if he could feel his pulse.

  Zheng Jiacheng didn't refuse and offered his wrist to Song Zheng. Song Zheng's face changed slightly. The pulse was indeed normal, and in fact, the pulse indicated that the old man was in excellent health.

  "Don't worry, Brother Song. In an hour, Venerable Zheng's illness should manifest." Lin Yu said, glancing at the clock on the wall.

  "Oh? Young man, how did you know that my illness will manifest in an hour?" Zheng Jiacheng asked, a hint of surprise in his voice.

  "Director Wei told me you have migraines. In an hour, it will be noon. The temperature will rise, the virtual fire will ascend, causing Qi and blood to rush to the head, easily triggering migraines." Lin Yu explained with a smile, his gaze unintentionally sweeping over the walnuts in Zheng Jiacheng's hand.

  Zheng Jiacheng nodded to Lin Yu in approval. Song Zheng, standing to the side, snorted, clearly displeased.

  Just as Lin Yu had said, as noon approached, Zheng Jiacheng, who had been chatting calmly, suddenly changed expression. His face became extremely painful, and he clutched his head with both hands. Large beads of sweat dripped down his face.

  "Venerable Zheng, please hold on. I'll administer the needles now." Song Zheng felt Zheng Jiacheng's pulse and then took out several silver needles from his medical bag. He first inserted them into the Qīng Lěng Yuān (Clear and Cold Abyss) and Tiān Jǐng (Celestial Well) acupoints on the San Jiao channel near the elbow, and then into a few more acupoints on the head and shoulder.

  "The索神针(Suǒ Shén Zhēn - Locking God Needle)?" Lin Yu was slightly surprised. No wonder Song Zheng was so arrogant; he indeed had real skills.

  Hearing Lin Yu name his needle technique, Song Zheng was also surprised, a haughty look on his face: "Yes, you have some knowledge."

  After Song Zheng finished this set of needles, the painful expression on Zheng Jiacheng's face clearly eased.

  "Haha, Jishitang truly lives up to its reputation!"

  Seeing his father's pain fade, Zheng Shifan breathed a sigh of relief.

  "A small favor." Song Zheng said with a casual smile.

  But before he could finish his sentence, Zheng Jiacheng, whose expression had just eased, suddenly trembled. He clutched his head with both hands again, letting out a pained roar, even more severe than before.

  The faces of everyone in the room changed instantly. Song Zheng was also taken aback, muttering to himself: "Impossible!"

  He quickly went forward to check Zheng Jiacheng's pulse again, and his face turned pale. The pulse was erratic, sometimes strong, sometimes weak, extremely strange.

  "Master Song, what are you waiting for? Hurry up and think of something!" Zheng Shifan urged.

  Song Zheng was now flustered and had no idea what to do.

  Seeing the critical situation, Lin Yu leaped forward, quickly removing the silver needles from Zheng Jiacheng's body. He then took six silver needles and inserted them into six acupoints on his neck and shoulders.

  "The Asking Fate Needle technique?"

  Song Zheng's jaw dropped in surprise.

  "Yes, you have some knowledge." Lin Yu returned Song Zheng's words to him, unfazed.

  As soon as Lin Yu inserted these needles, Zheng Jiacheng's entire body relaxed. The pain in his head vanished instantly, and his face gradually regained its color.

  "Dad, how do you feel?" Wei Gongxun said with great joy. He never expected that this He Jiarong was truly a master.

  "Much better."

  Zheng Jiacheng forced a weak smile, his breathing gradually stabilizing. The butler hurried over to wipe the sweat from his face.

  If you spot this narrative on Amazon, know that it has been stolen. Report the violation.

  Zheng Shifan didn't immediately celebrate, afraid that the recurrence of the previous situation might occur, but after a while, he didn't see any signs of his father having any problems.

  Only then did he relax, and he asked Lin Yu: "Young man, is my father's illness stopped or cured?"

  "Stopped."

  "Is there a way to cure it completely?"

  Song Zheng, standing to the side, looked alternately flushed and pale, clearly having lost Zheng Shifan's trust. But since he had failed earlier, he no longer had the voice.

  "There is, and it's very simple." Lin Yu smiled and then directed his gaze to the walnuts in Zheng Jiacheng's hand. "Actually, the main problem lies with these walnuts."

  "The problem is with these walnuts?" Everyone looked at each other, bewildered.

  "Venerable Zheng, may I see these walnuts?"

  Lin Yu reached over and took the walnuts. He examined them carefully. In his eyes, these walnuts emitted emerald green light, clearly of great value. However, in the crevice of one of the walnuts, there was a thick black aura, similar to the black aura he had seen on that little girl.

  "If I'm not mistaken, these walnuts should be Qilin Wen (Kirin纹) Shizi Tou (Lion's Head), and they are quite old, dating back to the Qianlong period of the Qing Dynasty." Lin Yu said.

  "Excellent, young man, you have good eyesight!" Zheng Jiacheng's face brightened, slightly surprised and pleased. It was rare to meet someone who could identify the origin of his Lion's Head walnuts at a glance.

  "Even if it's extraordinary, it's just a pair of walnuts. What does it have to do with my father's headaches? Young Master He, are you joking?" Wei Gongxun was puzzled.

  Lin Yu didn't rush to answer and turned to Zheng Jiacheng: "Venerable Zheng, where did you get these walnuts, and how long have you been carrying them around?"

  "I bought them by chance from an antique market. I've been carrying them with me since I bought them, probably about half a year." Zheng Jiacheng recalled.

  "In that case, think about how long you've had this migraine." Lin Yu said with a smile.

  Zheng Jiacheng frowned and thought carefully. Then his face changed, and he looked at the walnuts in Lin Yu's hand in shock: "It seems like I've had this problem ever since I bought these walnuts!"

  Zheng Jiacheng had never believed in ghosts and gods and naturally didn't think about it. He just thought it was aaftermath (sequela) from years of overwork.

  "To be honest with you, these walnuts were obtained from a dead person, so they have absorbed somea leak (sha qi - evil aura). Because you have been carrying them with you, they have affected your luck. I believe that in the past six months, your career has not gone smoothly either." Lin Yu said.

  "That's right, I invested in two projects in the past six months, and both suffered heavy losses. I thought it was because I was getting old and senile. I was about to hand over the company's affairs to Shifan." Zheng Jiacheng said with a wry smile.

  "Young Master He, what you said about this sha qi, it sounds like a superstitious belief." Wei Gongxun frowned. People in his profession never believe in such things.

  "Many things are not necessarily superstitious. Some are principles refined by our ancestors from the operation of heaven and earth and natural laws, and they are highly credible. Otherwise, how could the Zhou Yi (I Ching) and the Bagua (Eight Trigrams) still be circulating today?" Lin Yu patiently explained.

  Wei Gongxun was at a loss for words. Lin Yu was indeed right. Many universities now offer open courses on the I Ching.

  "Young man, if I smash these walnuts and throw them away, will my father's illness be cured?" Zheng Shifan asked eagerly.

  "What a pity to destroy such a good artifact." Lin Yu smiled. "I have a way to cure Venerable Zheng's illness and still allow him to keep these walnuts."

  "In that case, I'll trouble you, young man." Zheng Jiacheng's tone was difficult to conceal his excitement. He really loved these walnuts. If he had to smash them, he would be heartbroken for at least a few days.

  "Venerable Zheng, do you have a cinnabar brush?"

  "Yes, I do." Zheng Jiacheng quickly instructed the old butler to fetch one from the study.

  After the cinnabar brush was brought, Lin Yu recited the Tomb-Sweeping Incantation, spat on the tip of the brush, and then lightly marked the two walnuts at the end. The thick black aura instantly disappeared, and the aura emitted by the pair of Lion's Head walnuts became even more emerald green and clear.

  Lin Yu handed the walnuts back to Zheng Jiacheng. After receiving them, Zheng Jiacheng felt a cool sensation coming from the walnuts, spreading throughout his body. It was as if all his meridians were opened in an instant, and he felt extremely clear and refreshed.

  Song Zheng, standing to the side, had a sullen expression, clearly not convinced. He felt that Lin Yu was merely being pretentious, but since Lin Yu had indeed cured Zheng Jiacheng, he had no choice but to accept it.

  "Young man, will my father's illness really not recur?" Zheng Shifan was still a little worried.

  "Really. If there are any problems in the future, Brother Wei can always come to arrest me. He knows where I live." Lin Yu joked.

  "Young Master He, you're too kind. Our whole family is grateful to you." Wei Gongxun said with a smile and then gave Zheng Shifan a look.

  Zheng Shifan immediately understood and said: "Brother He, please give me your bank card number. I'll have someone transfer five million to you first. If my father's condition doesn't recur in a few days, I'll transfer the remaining five million to you."

  "Shifan! How can you say that? We should transfer all ten million to the young man at once." Zheng Jiacheng said displeased.

  "Alright, we'll do as Dad says. Ten million, all at once."

  "Ten million?" Lin Yu touched his nose and smiled. "Can the diagnosis fee be set by me?"

  Everyone's faces changed slightly. Ten million wasn't enough? Was he trying to make a killing?

  "Alright, let the young man set the price. Whatever you say, goes." Zheng Jiacheng was generous. After all, the young man had saved his life. If he wanted more, it was understandable.