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

The next day happened to be the day when Beitang Xinyue was on her ten-day holiday. She and Lanya listened to Qin Suiyou's lecture in the study. Of course, Beitang Yan was also present on the makeshift lectern.

Beitang Xinyue, who had only attended one class before today, was still not quite used to having her brother present at this time. The feeling of having a parent accompany her was not too bad, but it just made her feel awkward. She didn't dare to chat with Lanya for a while, since there were only two of them in the classroom besides the teacher, making their presence quite obvious.

The lesson was not complicated. After explaining the connections and functions of most acupoints, we took a 15-minute break before it was time to check the two girls' memorization of the acupoint chart.

As a teaching assistant, the task of quizzing memorized texts was assigned to Beitang Yan. He held a notebook he used for taking notes and asked questions with a serious face.

Lan Ya had a basic understanding of the subject and asked questions fluently, though she paused occasionally. However, when it came to Bei Tang Xin Yue, an unexpected question arose.

"why are you laughing?"

Seeing her brother, who used to intimidate her with his occasional cold face, now asking this question with a straight face, she grabbed a book and covered her face, trying to suppress her laughter, but her trembling shoulders betrayed her.

Beitang Yan frowned and asked seriously, "Are you still going to memorize it or not?"

Feeling "threatened," Beitang Xinyue immediately put down her book.

"Recite it, recite it, recite it."

As she spoke, Beitang Xinyue rubbed her face mercilessly, trying to suppress the smile that kept welling up inside her.

Beitang Yan looked at it, unconsciously revealing his disgust.

"Are you ready?"

"OK OK."

Afterwards, Beitang Xinyue, having temporarily calmed down, finally performed well. She answered all of Beitang Yan's tricky acupoint descriptions accurately and fluently.

After sending Beitang Yan, whose disdain for his sister had lessened considerably, to fetch some tea and snacks, Qin Suiyou looked at Beitang Xinyue, who still seemed somewhat reluctant to leave, and asked, "Why did you smile as soon as you saw your brother just now?"

When Qin Suiyou asked, Beitang Xinyue didn't try to hide anything.

"Sister-in-law, you don't know, my brother wasn't like that when he was serious before. I believe he's only five years old now. His expression is so different from before. He really looks like a little kid pretending to be fierce. Lan Ya, don't you think so? He had that same expression when he was spanking you just now. I wanted to laugh for a long time, but I kept holding it in until I sat down in front of him and I couldn't help it anymore."

Lan Ya smiled slightly, pursing her lips. "Somewhat."

Recalling Beitang Yan's expression just now, Qin Suiyou nodded and said, "That's true, he was quite cute."

Upon hearing this, Beitang Xinyue exclaimed, "I reckon that in all my years, except when he was little, no one has ever said that my brother is cute. You are the first one, sister-in-law."

Qin Suiyou's lips curled up into a faint smile.

"You and your father and mother probably also think he is cute, you just haven't expressed it."

"is it?"

Beitang Xinyue appeared to be deep in thought.

"When my brother was complaining about me just now, his expression was actually quite cute. After all, this is the first time in my life that my brother has openly complained about me. He used to be very serious. If I did something wrong, he would just say 'It's okay' and let it go. But I did see him complain about the heavy perfume on the young ladies from noble families when we attended a palace banquet before. I found it pungent to me, so I can't blame him for complaining."

After listening to Beitang Xinyue's words, Qin Suiyou said, "You see, this is what family is. If someone else disliked you like he did just now, whether it was intentional or not, you would definitely be unhappy. But with your brother, you can appreciate his cuteness."

No sooner had Qin Suiyou finished speaking than Beitang Yan brought in tea and snacks.

"Who's cute?"

Lan Ya poured a cup of hawthorn fruit tea for each person to whet their appetite. Lunch was coming up soon, and the amount of pastries she brought was just right, not too big.

Qin Suiyou noticed that Beitang Yan was staring at him, seemingly questioning him with some displeasure.

"Of course I'm talking about Xinyue's brother."

Before Beitang Yan could react, he turned to look at Beitang Xinyue without saying a word, but his eyes were full of dissatisfaction and questions. He looked much more imposing than when he was whipping her back.

Beitang Xinyue clasped her hands together in a pleading gesture, swallowed hard, and said, "How about... you guess what our relationship is?"

Without hesitation, Beitang Yan replied, "Brother and sister."

Then Beitang Xinyue said with a chuckle, "So, who do you think your sister-in-law is saying is cute?"

"I."

"Pfft."

Both Beitang Xinyue and Lanya were amused by Beitang Yan's matter-of-fact manner, but they immediately stopped laughing.

However, Beitang Yan then asked, "Is there a problem? Isn't that right?"

"No problem, it's just you, you are the most adorable person."

Stroking Beitang Yan's head to soothe his fur, Qin Suiyou spoke in a sticky, affectionate tone, as if coaxing a cat that had thrown a tantrum.

Beitang Yan blushed slightly at the praise, almost blushing shyly, but remembering that his sister and Lan Ya were present, he restrained himself a bit, but still said proudly, "That's right."

After appeasing the spoiled "kid," the group drank some hawthorn fruit tea together, and then each ate a piece of pastry. Qin Suiyou then assigned homework to Beitang Xinyue and Lanya.

"You'll have a longer time for this assignment. In a month, you'll need to work together to submit a life-sized diagram of the human body's meridians. This is just a reference; it's only an outline. After you roughly draw it, you should mark the acupoints I discussed today at the corresponding locations. Of course, if I teach any new ones in later lessons, you'll need to add them as well."

The two girls took the reference image and both let out a sigh of relief.

"Is it that detailed?"

The image, as if printed, depicts a remarkably three-dimensional human body with its veins arranged in various colors, forming a human silhouette from head to toe.

Pointing to Beitang Yan, Qin Suiyou said, "This was painted by him. Because it was quite a lot of work, he only painted one copy. You all have to take good care of it. If you have any questions during the process, you can come to me. If I'm busy, you can ask Lu Yu."

Qi Qi looked at Beitang Yan with admiration, and Beitang Xinyue even asked, "Sister-in-law, this kind of painting is too difficult. What if we can't paint it well? Can we...?"

It was clear that they wanted Beitang Yan to assist them.

Qin Suiyou shook his head, "No, this is also a test. After all, we have the reference drawing in hand, and it's a task for the two of you to complete together. It's not that difficult. The key is patience and perseverance."

Seeing the troubled expressions on the faces of the two people in front of him, Qin Suiyou couldn't help but sigh. This was the same pain that so many college students had in his previous life. In the process of learning a major, they were forced to learn many more skills.

After looking at the reference drawing and thinking for a while, Lan Ya said, "Zheng Jun, it seems that this kind of drawing is not easy to draw with ordinary pens."

"The tools have been prepared for you, since you will be using them for a long time. The ones I'm giving you are hard pens that won't fade easily. How has Xinyue been using the pens these past few days?"

Beitang Xinyue nodded and said, "It's alright. Her handwriting might still be a bit lacking, but her drawing should be less of a problem."

"That's good. The tools are all in this little box, but you'll have to prepare your own paper, since there will definitely be a lot of waste in the process."

Upon hearing this, the two girls gradually developed a bad feeling.