A little over a week ago.

When writing a letter to Jia Xian, Old Su once mentioned some situations to Xu Yun:

Jia Xian is advanced in age, and what he studies daily are relatively profound mathematical problems, not swayed by money.

To persuade him to come to Bianjing to help, they must present something compelling enough to entice him.

Therefore, when choosing what to write in the letter.

Xu Yun could only rack his brains to include the knowledge Jia Xian might be most interested in.

Such as yin-yang... which is the odd-even changes, a few binomial issues, and...

The very famous cube root problems in the "Nine Chapters on the Art of Mathematics," which up to now have few solutions, among others.

Unexpectedly.

The 'dose' Xu Yun gave seems a bit too much, and the other party is already on the way, following the internet cables.

Of course.

Due to the limited perspective.

Xu Yun was unaware that a reader was preparing to visit him personally with a knife, and he was still leisurely teaching his class.

On the second day of Wang Yue's recovery, he saw Xiaoli coming to the mansion on time again.

"Miss Li."

Xu Yun first greeted Xiaoli familiarly, then glanced behind her with some surprise and asked:

"Why don't I see Prince Jian today?"

In the past period.

Xiaozhao and Xiaoli would come together almost every day or two, listening to Xu Yun teaching the basics of physics with Old Su.

Now ten days have passed.

Even Xiaozhao and Xiaoli, who had no foundation in physics, could already do basic force analysis.

According to the agreement when dispersing the class two days ago.

Today, Xiaoli and Xiaozhao were supposed to arrive at the mansion simultaneously even if Xiaozhao could not come due to something, he should have sent a message in advance.

After all, the concept of keeping promises was valued by ancient people.

Even standing someone up required following etiquette, and perhaps even offering gifts as an apology.

Unlike some authors later, who have no expressions even if they delay.

Upon Xu Yun's inquiry, Xiaoli's face immediately became solemn:

"Wang Lin, some unforeseen events occurred in the palace today, and I'm afraid Prince Jian won't be able to attend the lesson."

Xu Yun blinked and asked in surprise:

"In the palace? Isn't Prince Jian no longer involved in palace affairs?"

Previously mentioned.

After Emperor Huizong ascended the throne.

To avoid suspicion... or to save his life, Xiaozhao's personality 'was forced' to change drastically.

Not only did he frequent taverns and brothels, but he also avoided attending court meetings and had little contact with the court.

He was even reported to the Zongzheng Temple several times but was "generously" suppressed by Emperor Huizong.

In this context.

Today's Xiaozhao being in the palace is indeed surprising.

Seeing Xu Yun's surprised expression, Xiaoli first glanced around.

After confirming no one else was nearby, she lowered her voice and said:

"Last night at the hour of Yin, Empress Dowager Xiang fell during the night; it seems like it's quite serious..."

Upon hearing this, Xu Yun's pupils shrank immediately.

Empress Dowager Xiang.

This is a character in Huaxia history who is not prominently featured but is nonetheless significant.

She is considered insignificant because her past life was uneventful:

She was the great-granddaughter of Prime Minister Xiang Minzhong and the Empress of Zhao Xu, Emperor Shen Zong of Song. In 1085, when Emperor Zhezong ascended the throne, she was honored as the Empress Dowager.

In Huaxia history, women with similar resumes are not exceedingly many, but neither are they too few.

From the time of Ying Zheng proclaiming himself as emperor during the Qin Dynasty to Pu Yi's end, there have been over 400 emperors in Huaxia history, and conservatively estimated over 300 Empress Dowagers.

Compared with empress dowagers like Cixi, Empress Dowager Xiang indeed lacks highlights.

As for being unignorable.....

It's the fact that she, as mentioned before about Xiaozhao, was the greatest contributor, or possibly the sole aid, allowing Emperor Huizong to ascend the throne.

In terms of nature.

Empress Dowager Xiang's misjudging of people... or her choice to forcibly support Emperor Huizong to secure her position is a key turning point in Northern Song's path to sudden collapse.

Therefore, as a Song Fan, Xu Yun vaguely remembered the cause of Empress Dowager Xiang's death:

In the year 1101.

Empress Dowager Xiang died suddenly in January due to a sudden stroke.

She was fifty-six or fifty-seven years old at the time.....

Before this, historical records noted she 'remained in good health.'

Which means...

According to historical trajectories, Empress Dowager Xiang did not... maybe... possibly... likely.....

experience this fall?

Realizing this.

Xu Yun's eyes flashed with a moment of surprise and doubt.

Because he thought of...

Old Su.

Similarly, according to the normal trajectory, Old Su should have already left Bianjing, returning to his hometown in Jingkou.

But currently.

Due to Xu Yun's sudden appearance, Old Su gave up the idea of returning to Jingkou and temporarily stayed in Bianjing.

Additionally, having saved Wang Yue who should have died, it can be said that in terms of the timeline, there are already severe discrepancies between the dungeon and historical standard lines.

More crucially...

Xu Yun, or many experts in the later generations, speculated:

Old Su might die next year because he fell during this time, leading to a sudden and depressed mental state.

Suppose - just suppose, if Old Su's fall happened on the way back to Jingkou?

Could this lead to another speculation:

Empress Dowager Xiang's fall was supposed to happen to Old Su instead?

Just like the butterfly effect that has been mentioned countless times.

Xu Yun flapped his wings at Old Su Mansion, and Empress Dowager Xiang in the palace was blown down?

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