A crown princess who doesn't do infrastructure construction isn't a good doctor.

After instructing Gao Yu to find him tools and jade materials, Beitang Yan found a book about jade ornament patterns from somewhere and read it with great interest.

"You're not drawing anymore?"

Beitang Yan raised his head and answered seriously, "I will draw it. Once I find a suitable pattern on it, I will draw it and then carve it onto the jade pendant. Besides, I have basically mastered what you taught me today. You said you would teach me the new drawing method after the materials are ready, but I have time at my disposal now."

Qin Suiyou narrowed his eyes and said in a dangerous tone, "How old are you? How dare you be so arrogant?"

Beitang Yan said with a serious face: "I'm twenty-two years old, not a child."

Pinching and rubbing Beitang Yan's cheek, Qin Suiyou gritted his teeth and said, "Only little kids like to emphasize that they're not little anymore. You, you're not exactly two years old, but you can't be more than five!"

Despite his wife squeezing his face, Beitang Yan insisted, "It's not just five years old. What five-year-old child is as tall as me?"

Qin Suiyou continued without stopping.

"You seem quite confident about your height."

Beitang Yan said in a deep voice, "I'm much taller than you. I think the only one who can compare to me right now is Zhu Yu."

Thinking of Zhu Yu, who was at least 1.9 meters tall, and then looking at Beitang Yan, Qin Suiyou hadn't even noticed how tall Beitang Yan was. So he subconsciously asked, "Are you really about the same height as Zhu Yu?"

Beitang Yan raised his voice and said, "You don't believe me?"

"Believe it, of course I believe it."

However, you can't tell much when they're sitting down. Zhu Yu is quite thin, so he looks exceptionally tall, while Bei Tang Yan is the type who looks slim in clothes but muscular when undressed. His proportions are also good, so if you don't look at his long legs when he's sitting down, you wouldn't be able to tell that he's as tall as Zhu Yu.

After taking a fresh look at Beitang Yan, Qin Suiyou withdrew his hand. After all, Beitang Yan's face was already flushed, and pressing down on it again would probably leave a handprint.

Then, Qin Suiyou watched as Beitang Yan, who had once again abandoned everything else to continue studying the patterns on the jade ornaments, couldn't help but think to himself: If this person's memory were to return, he wouldn't be so erratic.

However, it remains to be seen what he will be like after his recovery. But the current Beitang Yan still has many merits. For example, he will deal with people he doesn't like on the spot. Even if it's not very dignified, it's still very satisfying.

The incident occurred on the day that Chu Yuning accompanied him to the Chu residence.

While keeping an eye on the news outside, and estimating that the news of Chu Yuning gaining the favor of Princess An had spread sufficiently, Chu Yuning, with Princess An's approval, returned to the Chu residence with a batch of gifts that were neither too heavy nor too light.

Before leaving, Qin Suiyou originally planned to have Lu Yu accompany him and Chu Yuning to the Chu residence, but Beitang Yan insisted on coming along. Too lazy to argue any further, Qin Suiyou had Beitang Yan change into a servant's uniform with him. In order to make Beitang Yan, who was tall, less conspicuous, he had to use a trick.

After disguising themselves as attendants, the two quietly blended into the attendant ranks. It wasn't until Chu Yuning met and reminisced with her grandparents, who were the Grand Tutor and the old lady, that she led the two to the bedroom of her father, the Grand Secretary Chu Yi.

Standing outside the screen facing the bed, Qin Suiyou revealed his identity, while Beitang Yan was left out. However, his behavior of standing next to Qin Suiyou still made Chief Minister Chu, who had been working diligently in the court for more than ten or twenty years, notice something strange. But he concealed his aura and acted like an ordinary patient, revealing nothing.

The other servants had been sent out, and apart from Chu Yi, the patient, only Chu Yuning, Qin Suiyou, and Beitang Yan remained in the room.

After introducing themselves, and hearing the occasional coughing coming from inside, Qin Suiyou first asked Beitang Yan and Chu Yuning to put on masks before the three of them went over.

Qin Suiyou stepped forward, dragged over a low stool, and sat down. Then, pointing to the edge of the couch, he said to Chu Yi, "Lord Chu, please stretch out your hand a little."

Chu Yi had only received a secret letter from his daughter some time ago, informing him that someone had a high chance of curing his illness. However, he did not expect it to be this Prince Zhengjun, whom he had never met before. He had some doubts, but since the person had already arrived, Chu Yi did not stand on ceremony and placed his hand in the spot that Qin Suiyou pointed to.

After taking Chu Yi's pulse, Qin Suiyou looked up and met his gaze.

"Did the doctor who took your pulse earlier say you had tuberculosis?"

Chu Yi leaned against the headboard and slowly nodded.

"No cough cough cough...that's right."

Chu Yuning also knew this. Chu Yi was not surprised at all when Qin Suiyou said it. His eyes were gentle but questioning as he waited for Qin Suiyou to say something next, wondering if it would give him real hope.

"Actually, what you have is not tuberculosis."

Chu Yi was somewhat surprised upon hearing this, and suppressed a cough as he asked, "What makes you say that?"

"Both you and Grand Tutor Chu suffer from diabetes, but yours is more severe, causing great damage to your body. What was originally just a common cold has gradually developed into a serious lung disease. I don't know if the physician in charge of your health diagnosed your pulse or if you found a quack doctor outside who diagnosed your common cold as tuberculosis. As a result, you have been taking the wrong medicine, which has caused your condition to deteriorate to this day."

His clear, crisp voice possessed an inexplicable power to convince people.

Chu Yuning had already gained an understanding of Qin Suiyou's abilities because of Beitang Yan's injury, and now that she thought about how the doctor who had examined and treated her father was someone brought in from outside, she couldn't help but feel a chill in her heart.

"Father……"

Chu Yi gestured for his daughter to calm down, then asked Qin Suiyou, "Did Yuning tell you that her grandfather suffers from diabetes?"

Qin Suiyou shook his head and said in a clear and gentle voice, "No, Miss Chu only told me about your serious illness. As for what kind of illness it is and whether there are any other symptoms, I can only tell now. As for the fact that Grand Tutor Chu suffers from diabetes, in addition to the fact that diabetes is a disease with a high probability of being hereditary, many people in Yejing City have heard that Grand Tutor Chu always secretly eats sugar because he is concerned about his health."

Looking up at her daughter, Chu Yuning shook her head at her father, confirming that what Qin Suiyou said was indeed the truth.

Chu Yi smiled and said, "I'm sorry you had to laugh at me, but Yu Ning's grandfather is not young anymore. As long as it's not excessive, we should at least go along with his wishes a little."

"That is indeed the case. Moreover, if needed, I can prescribe two doses of medicine for you and Grand Tutor Chu. After taking the medicine, you will be able to eat normally without any problems. I just don't know if you will dare to trust my medicine."

After staring at Qin Suiyou for a while, Chu Yi said, "Of course there's nothing I wouldn't dare to do, but I'd like to trouble you to tell me, is there any cure for my lung disease?"

"Of course there are, otherwise I wouldn't dare to talk about the future. Besides, you don't know this, but my uncle, Qin Yong, the Vice Minister of Rites, also suffered from typhoid fever and lung disease a month ago. It wasn't as serious as yours now, but there probably aren't many doctors in the entire Yejing who can quickly treat this disease that is very similar to tuberculosis. The fact that he can go to court now is the result of my treatment."

Looking at Qin Suiyou's confident yet not annoying arrogance, even Chu Yi, who had been immersed in the court for many years, had to admit that this man truly possessed a magic that made people easily convinced of his abilities.

"Next, cough cough cough... I'll have to trouble you, Lord Zheng."

"Since you trust me, I will not let you down. I will write out a prescription shortly. Please lie down and I will administer a few acupuncture treatments to relieve your symptoms. This will make you feel better and will also help with your recovery."

Chu Yuning stepped forward to help Chu Yi lie down. Seeing her daughter's unconcealed worry, Chu Yi comforted her, "Don't frown, or you won't look good."

"As long as her father gets better, it doesn't matter if his daughter is ugly beyond recognition."

Chu Yi sighed helplessly.

"What kind of girl talks about herself like that?"

"It's available now."

After adjusting his father's position, Chu Yuning took a few steps back to make room for Qin Suiyou.

Qin Suiyou let Beitang Yan, who was carrying his bag, step forward. He then took out his needle case and used ordinary silver needles, which were less noticeable.

"Close your eyes and try to breathe calmly. If you can't help coughing, you can raise your hand to remind me..."

"Alright, that's enough, Ayan, quickly bring that spittoon over here."

Beitang Yan was startled by the new title, but he had already grabbed the spittoon as Qin Suiyou had instructed.

Chu Yi, who was on the bed, opened his eyes and was about to say something when he felt an uncontrollable itch and churning in his throat. Just then, a spittoon was handed to him, so he took it and coughed into the mouth of the spittoon.

Chu Yuning wanted to pat her father on the back, but Qin Suiyou immediately stopped her as soon as he saw her move.

"No filming, Miss Chu. Go get a handkerchief to wash your face and some water to drink."

Seeing her father coughing so painfully, Chu Yuning couldn't bear it, but fearing that she might cause trouble if she acted rashly, she still went to get two things as Qin Suiyou had told her.

When Chu Yuning returned, she saw that her father had just stopped coughing, so she took some things and went over to wipe him carefully, and then fed him some water to rinse his mouth.

"Miss Chu, when you have your servants deal with the filth in here later, be sure to mix some lime powder into it first."

Chu Yuning didn't know why he had to do it, but he agreed anyway.

Qin Suiyou then took out paper and pen and wrote out the prescription. Chu Yuning took it and looked at Chu Yi, her face showing some hesitation.

Chu Yi knew what his daughter was thinking. After letting out the most comfortable sigh he had taken in a long time, he said, "You're going to the Prince An's residence eventually. You don't need to tell your aunt about the prescription. Just give it to Old Wu in a bit."

Old Wu was the head steward of the Chu family and Chu Yi's most trusted servant. During this period, apart from Chu Yuning's aunt, who was also her stepmother, it was Old Wu who took care of Chu Yi's daily life.

"Yes, my daughter understands."

Chu Yi then took a long, deep breath, feeling a long-lost sense of ease. Seeing this, Qin Suiyou asked, "Does your breathing still feel labored?"

Chu Yi smiled and shook his head.

"No, and my chest doesn't feel tight anymore. I feel great."

Hearing the expected result, Qin Suiyou smiled and nodded.

"That's good."

Seeing her father's visibly relaxed expression, Chu Yuning happily said, "Thank you, Lord Zheng."

"Don't mention it, it's my duty, I can't let the payment go to waste."

Chu Yuning had already discussed the matter of reward with Qin Suiyou. Qin Suiyou did not ask for anything else, only asking her to give him one thousand taels as a reward. Chu Yuning asked why he did not want anything else, but Qin Suiyou did not answer. So the matter was temporarily settled.

"Knock down."

Just as Chu Yuning was about to say something, she heard a knock on the outer door. She then told Qin Suiyou and Beitang Yan, who had already removed their disguises, to hide behind the screen on the inside, and went to open the door herself.

When the door opened, what came into Chu Yuning's view was a face that Chu Yuning was familiar with but also didn't really want to see.

"Xiao Wei, what brings you here?"

Standing outside the door, Chu Wei snorted coldly and said arrogantly, "If my eldest sister, who is already married, can come back to visit Father, why can't I, as the legitimate son, come?"

Chu Yuning remained calm, unperturbed by Chu Wei's rudeness, but still did not fully open the door and prepared to leave.

"Father has gone to sleep again. Come back later. I have to go back to the Prince An's residence."

However, Chu Wei did not get what Chu Yuning wanted. Although he was only a fifteen-year-old boy, he was already taller than Chu Yuning. Taking advantage of his height, he blocked Chu Yuning's way.

"Why are you in such a panic, sister? You've finally come back, so we siblings should catch up. Let's go inside and talk. Father usually falls into a deep sleep after taking some sedatives, so we won't wake him up if we talk for a while."

Chu Wei looked at Chu Yuning with a mocking gaze as he spoke, taking steps forward, forcing Chu Yuning to retreat back into the room.

"Just come in naturally, there's nothing shameful in Father's room, right, eldest sister?"

"Of course not, just say what you want to say here."

Chu Wei strode to the stool in the outer room, put one foot on another stool, and propped his hand on the table. His nonchalant demeanor made Chu Yuning frown.

Chu Wei, however, was completely oblivious and continued shaking his leg.

"Rumor has it that Eldest Sister is very favored by the Princess Consort of Prince An's residence. Now that you, as a concubine, are allowed to return to the residence to visit her, do you think it's because Beitang Yan is about to die and Prince An's residence is trying to win over our family?"

Chu Yuning didn't react much when Chu Wei mentioned that he was a concubine, but after hearing the rest, she became somewhat annoyed with her half-brother.

"Chu Wei, you'd better watch your words."

"Tsk, what are you upset about? I didn't say anything wrong."

"No matter what, the heir is still a member of the royal family, and it's not your place to criticize him."

Finding the older woman's words rather dull, Chu Wei turned his head and fiddled with the teacups on the table.

Then, as if remembering something, he added, "Let's not talk about him then. Let's talk about you, eldest sister. You are the daughter of the Grand Secretary of Yejing, renowned throughout the capital. So many talented men have sought your hand in marriage. Now you can only be a concubine living a life of widowhood. You must be unwilling to accept that."

Chu Yuning closed her eyes, trying hard to suppress the urge to get angry.

"Chu Wei, let's end this topic here. You can leave now, and I should go back too."

"No."

Chu Wei looked at Chu Yuning, who had stood up, and called out to stop.

“I haven’t finished yet. I remember on the day you got married, there was a cousin of some vice minister who entered the Prince An’s mansion before you and became the heir’s wife. He’s just a filthy thing who thinks about using his ‘back’ to win over men. You can get rid of him. With your family background, you will definitely be able to rise to the top.”

"Chu..."

As Chu Wei's words became increasingly outrageous, even bordering on disrespectful and insulting, Chu Yuning was about to shout angrily when she was interrupted by a figure rushing out from inside.

Chu Wei, who had been punched to the ground, hadn't even had time to feel the pain before he felt a barrage of relentless blows. When he came to his senses, he tried to call for help, but found that he had inexplicably lost his voice and couldn't struggle. His face was filled with terror.

When Chu Yuning finally saw who it was, she still spoke up to stop them. It wasn't that she felt sorry for Chu Wei, but that Beitang Yan's fists and feet, which came from the battlefield, were simply not something that a pampered young master like Chu Wei could withstand.

"Please stop right now, something bad will happen if you keep fighting."

Chu Yi, who was pretending to be asleep in the inner room, also tried to call for a stop, but Beitang Yan wouldn't listen at all. It wasn't until Chu Yuning was about to go out to call for help that Qin Suiyou finally came out.

"Okay, let's take a break."

Chu Yi and his daughter Chu Yuning couldn't help but smirk. So be it, beating someone had even made him tired.

Upon hearing Qin Suiyou's voice, Beitang Yan, though still somewhat resentful that his wife had been spoken ill of, obediently stopped.

Looking at the unconscious person on the ground, Qin Suiyou said, "Please forgive me, Lord Chu and Miss Chu. This second young master was indeed quite rude. It was a bit presumptuous of me to give him a small punishment today, but it was for his own good. To avoid trouble, I will erase some of his memories from just now, and I will also heal his injuries as soon as possible."

After saying that, without waiting for the father and daughter to speak, Qin Suiyou pulled out a silver needle and stuck it into the top of Chu Wei's head. Then he stuffed a pill into his mouth, which was quite simple, direct and brutal.

"Alright, just send someone to take the second young master back to his room. I'll head out now."

The two walked away with an air of nonchalance, leaving the father and daughter looking at each other in bewilderment.

"What was the nature of this gentleman when he was in the Prince An's residence?"

"He's an extraordinary person, but also a good one."

"Alright, let's find someone to carry that brat back first."