The prince was not in a hurry to leave, and waited here for a reply with the saint.

  Eunuch Hu rode his horse at full speed to Gu's house.

  Upon hearing that Eunuch Hu was coming, everyone in the Gu family went out to greet him.

  Including Zhang Yingzi, even though she looked down on Eunuch Hu, she had to come out to greet him.

  Therefore, at this time, Eunuch Hu represented a saint.

  "The Saint heard that Old Man Zhang, who had saved General Gu, was seriously ill and had asked for a royal physician, so he sent this servant to inquire about his condition." Eunuch Hu said, "How is Old Man Zhang doing now?"

  Zhang Yingzi's eyes lit up and she couldn't hide her pride and joy on her face.

  Look, even the saints value them so much.

  Gu Shangqing invited Eunuch Hu into the house, and Doctor Lu explained the situation to Eunuch Hu.

  Eunuch Hu's eyes flashed, and he said, "I will return to the palace to report. The Saint is still waiting for my reply."

  Gu Shangqing and Li Mumu knew as soon as they heard what was said that the Saint was suspicious of Old Man Zhang's illness.

  "Eunuch, do you need me to go back with you to report to the emperor?" asked Doctor Lu.

  "If that's the case, then it's naturally good. But Old Man Zhang's illness..." Eunuch Hu hesitated.

  "I'll come back after I finish reporting." Doctor Lu said, "I also want to go back to the Imperial Hospital to look through some medical books."

  "That couldn't be better." Eunuch Hu nodded.

  "I'll see Eunuch Hu off." Gu Shangqing said.

  "General Gu, you are too polite." Eunuch Hu said politely.

  In the end, it was Gu Shangqing and Li Mumu who sent Eunuch Hu and Doctor Lu away together.

  Soon after Eunuch Hu left, Zhang Yingzi complained, "Dr. Lu is such a jerk. He didn't intend to report back to the palace. Why did he take the initiative to go? What if my father suddenly gets sick during this time?"

  Gu Shangqing and Li Mumu were not there, and no one else from the Gu family present paid any attention to her words.

  Who would pay attention to such brainless nonsense?

  Seeing that no one paid attention to her, Zhang Yingzi snorted softly and went back to her own yard.

  She pushed the door open and entered Old Man Zhang's room. The room was filled with a strong and bitter smell of medicine.

  Zhang Yingzi was very happy, his eyes sparkling as he asked, "Dad, do you know who came just now?"

  "Who's here?" Not knowing whether it was because of the effect of Doctor Lu's prescription, Old Man Zhang felt that his body was much more relaxed than before. Although he still had insufficient breath to speak, he still felt better.

  "The Saint sent Eunuch Hu here," Zhang Yingzi said, "He heard that you were ill, so he sent him to inquire about your condition. Imperial Doctor Lu even followed you back to the palace to report to the Saint."

  "Because we saved General Gu before, even the Saint knows about it." Zhang Yingzi said excitedly, "He even specially asked people to show concern for us, which shows that in the eyes of the Saint, we are very good."

  "Let alone ordinary people." Zhang Yingzi sat down beside Old Man Zhang's bed excitedly, "Even among the court officials, how many of them could impress the saint so much that he would send someone to pay attention to them?"  

  "Dad, the saint remembers us, maybe he will reward us!" Zhang Yingzi's cheeks flushed with excitement. "Didn't Madam Gu become a county lady because of the saint's reward?"

  "Who knows, maybe we will be rewarded with something." Zhang Yingzi dreamed excitedly.

  "Yingzi." Old man Zhang saw that Zhang Yingzi was about to leave and never come back, so he said, "Let's not think too much about it for now."

  "I know." Zhang Yingzi said, obviously not thinking straight, "Now the most important thing is to cure your illness, Dad."

  Old man Zhang sighed silently.

  Doctor Lu went to the palace to meet the emperor and explained the old man Zhang's condition in detail.

  The saint was silent for a moment, then slowly asked, "Doctor Lu, in your opinion, is it possible that the old man Zhang's condition was poisoned?"

  Doctor Lu was surprised, and the sage asked again: "Didn't you say that there seemed to be poison in his body?"

  "Yes, but what I meant was that it was not poison, but lung poison." Doctor Lu said, "However, the point raised by the saint is not impossible."

  "But Old Man Zhang is just an ordinary person. If he was poisoned, who would use such a complicated poison to harm an ordinary person like him?" Doctor Lu said puzzledly.

  "Complex poison? Do you know this kind of poison?" asked the saint.

  "I don't know. It's because I don't know that I find it complicated." Doctor Lu said, "After taking Mr. Zhang's pulse, I'm not sure about the disease. I need to look through medical books to see if there are similar symptoms. I have never associated it with poison. If it is really poison, then the symptoms of poison can confuse a doctor with the disease."

  "It is a chronic poison that has kept Old Man Zhang alive for nearly a month, and has kept him bedridden." Doctor Lu said, "This kind of poison is very difficult and complicated to make, and it must be very expensive. If such a poison was given to Old Man Zhang, I really can't understand it, so I didn't think of it as poison."

  "If it is poison, do you recognize it?" asked the saint.

  Doctor Lu shook his head slowly. "If it is a poison, it must be made up of many kinds of medicines. I need to try it over and over again. Even if I get similar results, it may not be the poison. If we assume that Old Man Zhang is poisoned, and we are not treating the disease but the poison, then I can only try to look through medical books and summarize some combinations of herbs that have this effect to narrow down the scope."

  "The saint's suspicion has indeed reminded me that perhaps I should not stick to the identity of Old Man Zhang and assume that it is impossible for someone else to poison him. If I think about detoxification, perhaps I will make different discoveries." Doctor Lu said.

  "You can try both curing the disease and detoxifying at the same time," the saint said, "but don't tell anyone else for now, including Old Man Zhang and Zhang Yingzi, and don't say you're detoxifying, just treat it as curing the disease."

  Doctor Lu was shocked and wondered if he was involved in something serious.

  Doctor Lu knelt down hurriedly and said, "I obey your order. I will not tell anyone, including the Gu family. I will not mention a word. If anything happens, I will report it to the saint immediately."

  The saint nodded, "Yes."

  "You go." The saint said to Doctor Lu.

  After Doctor Lu left, the sage said to the prince, "Tell me, what reason can we find to separate Zhang Yingzi and Old Man Zhang?"

  The prince was smart and immediately asked, "Does the saint suspect Zhang Yingzi?"

  Before Imperial Physician Lu went to the palace to report, the emperor had already sent people to Chong'an to investigate Old Man Zhang and Zhang Yingzi.

  Check who they have had contact with recently, what was unusual about Old Man Zhang before he fell ill, etc.

  "From Pan Lunchi's previous report and what the Crown Princess said today, Zhang Yingzi is really not someone who can keep secrets," said the Saint. "She is simple-minded and stupid. If we can separate her from Old Man Zhang, we may be able to get something out of her."