Old Master Mu really didn't want to pay any attention to Du Changjun, who just loved to specialize in difficult ancient books.

Moreover, his questions were too tricky, and every time he came, Old Master Mu had to rack his brains to answer them.

When did you become interested in medical books again?

"Sir, this is no simple medical book. I only have a superficial understanding of the theories about Qi and blood circulation within it..."

"Can't you see I'm busy right now?" Old Master Mu didn't want to explain today.

"This..." Du Changjun noticed that Elder Mu was teaching Qiu Ling'er to read today, and he felt extremely envious.

The gentleman is so biased.

Qiu Ling'er chuckled, "That's simple, it's just luck."

Du Changjun looked at Qiu Ling'er, "Little girl, do you understand?"

Qiu Yan, like her older sister, is arrogant and disdainful of others.

"Yun means operation, and Qi refers to the Qi of Heaven and Earth, which is the Yin and Yang Qi."

Old Master Mu smiled and stroked his beard gently. "Ling'er is absolutely right."

Du Changjun asked again, "What is Yin, and what is Yang?" The book was profound and difficult to understand, and he did not believe that a little girl could understand its profound meaning.

Qiu Ling'er laughed and said, "Yang is where the sun shines, and Yin is the opposite. It's that simple, how can you not understand?"

Du Changjun raised an eyebrow. "That's it?" This girl's answer was far too simple.

He wanted to say more, but then he heard Old Master Mu say to him, "Ling'er has already answered your question. If there's nothing else, you can leave now."

Qiu Ling'er noticed that Du Changjun was standing still and unwilling to move, so she took the initiative to say goodbye to Elder Mu and left the courtyard.

She didn't want to disturb Du Changjun's pursuit of knowledge.

Just as she came out of Elder Mu's courtyard, she saw her brother and Zhou Zifang also leaving the academy.

Qiu Xu was happy that his younger sister was able to receive personal instruction from Master Mu.

But Zhou Zifang was different.

In his view, Ling'er's good days were over.

Qiu Ling'er was enjoying herself, but Zhou Zifang was already worried about her.

"Ling'er, let's dine together at Xingyue Tower tonight."

"Well... my sister is still waiting for me to eat at home."

Qiu Xu nodded in agreement, "Brother Zhou, Ling'er is my sister."

Zhou Zifang ignored Qiu Xu's implied meaning and said, "Ling'er, it's good to change things up sometimes. Come on, you're so bored studying every day. It just so happens that your sister Song Jiao is also waiting for you to learn to play the zither."

At this point, Qiu Ling'er nodded.

She doesn't have much free time to begin with, so she naturally wants to make the most of the break between classes.

Before leaving, Qiu Ling'er said to Qiu Xu, "Brother, tell my sister that I'm going to find Sister Song Jiao to learn the zither."

After saying that, she turned around and followed Zhou Zifang to Xingyue Tower.

"Ling'er..." Qiu Xu looked at the two backs with displeasure. This Zhou Zifang had completely ignored him.

He felt that his perfectly healthy sister had suddenly become someone else's sister.

"Qiu Xu!" Gao Chong caught up from behind and stood in front of him.

Qiu Xu glanced at Gao Chong indifferently, ignored him, and turned to go back to the courtyard, but Gao Chong grabbed his arm directly, "Qiu Xu, let's make up."

For the past few days, the two have ignored each other whenever they meet. Now, Gao Chong doesn't want to become enemies with Qiu Xu.

"Only with good can there be harmony." In order to get rid of Gao Chong's entanglement, Qiu Xu pulled his arm over.

Unexpectedly, Gao Chong grabbed his sleeve again, "Come on, I'll take you somewhere."

"I'm not going." Qiu Xu ignored Gao Chong's attempts to make amends and turned back to the courtyard.

Gao Chong followed suit and was admitted to the hospital with him, saying, "I want to marry you and pray to heaven and earth."

"..." Qiu Xu coughed lightly, then suddenly turned around and touched Gao Chong's forehead. "He doesn't have a fever."