Xu Changāan was always the most serious person; since Li Zhibai had asked, he would naturally respond to her with the most comprehensive attitude he could muster.
Li Zhibai had only asked because she suddenly remembered that this student of hers was by no means an ordinary person, and so she wanted to know his view.
Just like how she wanted to know what the Heavenly Dao looked like in Yun Qianās eyes, since Changāan cared so much about Gui Water, then... Li Zhibai also wanted to know what this worldly "nightmare" of womenāmenstrual bloodālooked like in Changāanās heart.
Was it misfortune?
Was it evidence that highlighted the ignorance of the mundane world?
Or was it... a favor from heaven, because it offered a shortcut in Cultivation?
Li Zhibai had imagined many possible answers.
But after Xu Changāan wrote out the Five Elements and the Four Directions, and then circled Gui as the tenth of the Heavenly Stems, Li Zhibai was still a little dazed.
"So... heās explaining it to himself straight from the literal structure of the characters..."
For a moment, she didnāt know whether this student of hers was so dull as to be foolish, or so clever that it was excessive.
As a Mother, Li Zhibai hoped it was the latter, but deep down she instinctively felt it was the former.
["Above and below, the four directions make āYuā; from ancient past to present now makes āZhouā. Within this there are Five Directions: the center is Wu-Ji Earth, the west is Geng-Xin Metal, the east is Jia-Yi Wood, the south is Bing-Ding Fire, the north is Ren-Gui Water. The north belongs to Water, thus Gui is called Gui Water."]
However, as Xu Changāanās brush moved bit by bit in meticulous strokes, Li Zhibai watched that gradually steadying brushwork and fell into thought.
As Changāan wrote, she actually sensed within it a hint of Qimen Array intent... but arrays concerning the worldās orientations like this, even she only used the Five Directions logic when doing Alchemy. How did Changāan know of it?
The application of the Five Directions of Heaven and Earth was not something that could be fully understood beneath the Taixu Realm. Could it be... something from those past-life memories of his?
And alsoā
The north is Ren-Gui Water... so Gui, is called Gui Water.
A trace of confusion flickered in Li Zhibaiās eyes.
This... sort of seemed correct?
Ah...
As a woman herself, she had never once thought about her monthly matter from this angle.
When she was young, she would never have connected Gui Water to the Five Directions arrays; that was just too strange.
"Sir, about these things... Changāan shouldnāt have misquoted the classics, right?" Xu Changāan paused his brush for a moment.
"There are certainly no mistakes, but... how did you come to know this?" Li Zhibaiās eyes fixed tightly on Xu Changāan.
"Back when I was still on the island... I saw similar things in the Library Pavilion of Missās family." Xu Changāan smiled, spreading his hands. "Sir, back then, after I learned there were Cultivators in this world, I carefully read through all the more mystical texts on these matters."
"...Thatās true." Li Zhibaiās doubts were quickly dispelled. Although these theories could only be used to mobilize Spiritual Qi into arrays at the Taixu Realm, some capable worldly Alchemists could also use the matters of the Five Directions to seek fortune and avoid calamity, so it was nothing surprising for certain families to have similar books in their collections.
However, looking at the helpless expression on Xu Changāanās face, Li Zhibai couldnāt help the curve of her lips, because she suddenly understood.
"Changāan, you say you only went to read such books because you learned there were Cultivators... Iām afraid thatās not quite right, is it?"
"Hm? Then, Sir, what you mean is..."
"Ms. Yun."
Li Zhibai looked at Xu Changāan with a smiling gaze.
"Ms. Yun, in the past, never menstruated. Along this journey, from medical texts to the Escape Armor Technique, everything related to menstrual blood... youāve flipped it all over, havenāt you?"
Xu Changāan: "..."
He was at a loss for words.
So, in Sirās eyes, he had already become this easy to read. It was as if she had personally watched him poring over ancient texts day and night.
"Sir, could you... at least leave me a shred of dignity." Xu Changāan sighed softly.
Li Zhibai shook her head. "For Ms. Yunās sake, thereās no such thing as losing face... Itās just, you didnāt find anything in the end?"
"In answer to Sir, I didnāt find anything at all." Xu Changāan said helplessly. "I never understood the matter of menstrual blood; instead, I ended up memorizing these useless things like Heavenly Stems and Five Directions... Speaking of which, the arrays in the Sword Hall are all arranged according to the logic of the Five Directions, right?"
"...So you recognized them?" Li Zhibai blinked at Xu Changāan.
In the Sword Hall, she had laid down many Arrays and Barriers, but those things had never stopped Xu Changāan; his body practically brushed past them and they would shatter, fall apart at a touch. But since most of those arrays were only there to suppress the Spiritual Power turbulence in the Sword Hall caused by Alchemy, and Xu Changāan regularly helped tidy away the "weeds" and loose Spiritual Power stirred up by Spiritual Qi in the hall, the arrays were almost unnecessary.
Xu Changāan nodded. "I recognize a bit. I even paid special attention to the directions and did my best to avoid the arrays in the Sword Hall."
"You deliberately avoided them?" The rate of Li Zhibaiās blinking quickened.
"I avoided them... ah." Xu Changāan tilted his head, then suddenly realized something. "Sir, what you mean is... I was actually wasting my effort?"
"As long as you understand." Li Zhibaiās expression grew rather strange.
So that was it.
She had always thought it odd that when Xu Changāan was cleaning in the Sword Hall, his movements sometimes followed very strange paths. He looked as if he were avoiding the arrays, but in reality, by the time he passed by, the arrays would already be in tatters.
He avoided them, but did not completely avoid them.
Changāan understood a bit of Qimen and the Five Directions, but not much.
So what he thought was avoiding the arrays was actually him walking past and grinding them to dust.
How to put it...
It was somewhat... cute?
"Sir, what are you laughing at..."
"Nothing."
A soft smile lingered on Li Zhibaiās lips.
She suddenly discovered that compared to a Changāan who seemed to understand everything, she preferred this version of him who understood only halfāthis current state of Xu Changāan was perfect. He understood a bit of everything, but was far from mastery, so while Li Zhibai could be proud of his breadth of knowledge, she would not feel the frustration of having nothing left to teach him.
He truly made one fond of him.
"If youāre interested in Qimen and the Five Directions, I can teach you in the future." Li Zhibaiās tone was gentle.
Once she was certain that Changāanās potential would surpass Wen Liās, the Sword Dao was no longer suitable for him. A minor path like that naturally could not compare to the Qimen Technique of the four directions above and below, ancient and modern, and Li Zhibai just so happened to be well-versed in this. So from this discussion of menstrual blood, Li Zhibai developed the idea of teaching Xu Changāan Array Formation.
Moreover, Muyu Peak cultivated the "heart" and could make use of the Inner Realm... yet almost no one had ever tried to combine Qimen Arrays with the Inner Realm, because while powerful, it was extremely dangerous.
And yet, Changāan could completely ignore the dangers of the Inner Realm, so he could fully achieve entering the Inner Realm, manipulating the Five Directions Fate Disc to Cultivate, or dragging his opponent into the Inner Realm to do battle...
In doing so, he would neither need to clash blades with others, nor, with the arrays and Inner Realm as cover, worry about revealing too many of his secrets in future conflicts.
It really was very suitable.
Defeating enemies through arrays, strategizing from beyond a thousand miles, that was even more fitting for her Changāan.