He knew about the existence of magical artifacts. His uncle had once said that during the battle of Shanhai Pass, the Great Feng Dynasty had half of its success due to gunpowder and the other half due to formations. Magical artifacts were unique weapons of the Great Feng Dynasty and the source of their confidence as the legitimate rulers of the world. At this moment, Xu Qi'an suddenly realized the close relationship between magical artifacts and the Bureau of Heavenly Masters.

Song Qing hesitated for a moment before answering Xu Qi'an's question based on the principle of knowledge sharing. "It's not much of a secret. Do you know what a fourth-grade sorcerer is?"

Xu Qi'an shook his head. He didn't even know what the seventh grade of his own martial system was.

"Formation Master!" Song Qing said. "Alchemy masters create ordinary objects, and formation masters inscribe formations on them to turn them into magical artifacts."

Based on his understanding of the sorcerer system and the information he had recently obtained from Chu Caiwei, Xu Qi'an thought of many things at once. The alchemy master was complementary to the fourth-grade formation master. The alchemy master created powerful weapons, and the formation master processed them into magical artifacts. The sorcerer system was quite something. No wonder the Bureau of Heavenly Masters had such a high status in the Great Feng Dynasty.

Xu Qi'an secretly made up his mind to win over Chu Caiwei. He had no special purpose, but just wanted to gain a sincere love in this cold society.

"The second item is the Heart Shield, which is also a magical artifact. The material is very ordinary, but the real value lies in the inscribed formations, which can withstand the full force of a Qi Refining Realm expert six times, a Divine Condensation Realm expert three times, and a Copper Skin and Iron Bone Realm expert once."

The Copper Skin and Iron Bone Realm was the sixth grade of the martial system. Xu Qi'an finally knew what his own sixth grade was called.

"Finally, there's the Bone-Eroding Heart-Burning ointment. When applied to an arrow, it can kill a Divine Condensation Realm expert. It is ineffective against a Copper Skin and Iron Bone Realm expert because the arrow cannot penetrate their skin."

Xu Qi'an nodded. "I like all three of these things."

After a pause, he said, "That kind of alchemy is called grafting!"

Based on his past memories, Xu Qi'an told Song Qing about the grafting technique. The process was not detailed, but the advantages were explained in detail, such as improving the cold resistance, drought resistance, and disease resistance of plants, as well as improving the taste of fruit.

After listening, Song Qing was ecstatic and danced with excitement. He wished spring would come immediately so he could perform this great alchemy.

"That's a divine book! There's actually such an ancient alchemy book in the world, and I didn't even know it," Song Qing exclaimed with excitement.

...

Ding ding ding...

Xu Qi'an walked lightly up the stairs of the Observatory, carrying three magical artifacts that could not be measured by money."I can use one of these magical tools to exchange for the reward of opening the Heavenly Gate... but these things are all useful, I can't bear to part with them... I guess freeloading is the eternal source of human happiness... Tomorrow I'll go to the theater to listen to music."

He didn't ask for a single copper coin from the Celestial Observatory, but if he exchanged what he gained for silver, his aunt would be submissive and never dare to mock him again.

He would exchange everything for silver notes and then slap his aunt's pretty face... Thinking of this, Xu Qi'an became even happier.

"I stand in the fierce wind, wishing to sweep away all the endless heartache. Looking up at the sky, the clouds move in all directions, I hold my sword and ask who is the hero of the world..." With no one around, he sang the song from his past with great passion and ambition.

Turning the corner, he encountered a group of strangers and the two sides exchanged a glance.

... How awkward! Xu Qi'an's singing abruptly stopped and he retreated to the side expressionlessly.

There were three people on the stairs below, the one in the indigo robe in the center had white hair at his temples, a refined temperament, handsome features, and eyes as deep as a dark abyss, reflecting the years of wind and frost.

He was the kind of charming uncle who could make young girls scream.

The one on the left was a quiet and reserved young man, looking straight ahead with meticulous attention to detail.

The one on the right had a slight smirk on his lips and a wickedness in his eyes that made Xu Qi'an uncomfortable. However, when it came to looks, this effeminate young man was one of the most handsome men Xu Qi'an had ever seen, rivaling even the second son of his family.

As the three passed by Xu Qi'an, the effeminate young man sneered, giving him a sidelong glance.

In that moment, Xu Qi'an felt like he was being stared at by something terrifying, and involuntarily held his breath while his heart raced.

The three continued up the stairs and disappeared around the corner, and Xu Qi'an breathed a sigh of relief.

"That guy seemed to look down on me with hostility. Was my singing too arrogant?"

Hmm, he needed to be careful about what he said in the future, especially in public places.

For example: I want the sky to never cover my eyes again, and the earth to never bury my heart, so that all the Buddhas disappear.

Or: For the sake of sacrifice, we have great ambitions, daring to exchange the sun and moon for a new sky.

...

On the seventh floor, Song Qing, who had been informed by his younger martial brother, was waiting at the staircase for the three, led by the man in the indigo robe.

Chu Caiwei was gnawing on a sugarcane, leaning against the wall, looking nonchalant.

The three arrived on the seventh floor and Song Qing bowed, "Duke Wei."

The middle-aged man with white hair at his temples nodded slightly.

"Duke Wei, the teacher drank too much and is taking a nap, so please wait a moment."

The young man with a stern expression remained expressionless, while the effeminate young man furrowed his brow.

The refined middle-aged man didn't pay much attention and followed Song Qing into the tea room, casually saying, "When I was climbing the tower, I met an interesting young man. He didn't seem to be a disciple of the Celestial Observatory."

Chu Caiwei was about to speak, but Song Qing stopped her with a look and smiled, "Just a small insignificant person, but quite interesting."

The Nightwatcher had a notorious reputation, and in the eyes of civil and military officials, they were like tigers and wolves. They didn't need a reason to target someone.

Song Qing wasn't sure if Xu Qi'an had inadvertently offended this powerful eunuch and caused him to be unhappy.

"Interesting?" The refined middle-aged man smiled gently, "How interesting?"Song Qing hesitated for a moment before commenting, "A genius, a genius in alchemy. If he hadn't gone down the wrong path of cultivation and instead joined the Bureau of Astrology, his name would be recorded in the history books."

He neither lied nor concealed the implication that the Bureau of Astrology valued Xu Qi'an.

The young man with a gentle demeanor sneered.

The middle-aged man with a refined demeanor nodded slightly with a smile.

......

Xu Mansion, inner courtyard.

Auntie was cutting cloth and thread with a few maidservants, preparing to make winter clothes for her family. The weather was getting colder and Auntie planned to buy winter clothes for her children and husband.

Lü E finished the last stitch and cut the thread with her small silver teeth. She looked at the exquisitely embroidered lotus flowers and thought that they would look great on Lingyin.

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"Madam, I went to see Young Master yesterday and found that he still wears autumn clothes. He doesn't have any winter clothes," Lü E said softly.

Auntie glanced at her personal maid with a cold snort. "What do you want to say?"

Lü E lowered her head and whispered, "Let's make him one too."

"Forget it!" Auntie snorted. "That little brat always finds ways to annoy me and asks me to make clothes for him. He doesn't deserve it."

The maidservants worked silently as if they didn't hear anything.

"He comes to our house for meals every day, but he never contributes to the household expenses."

"Young Master's salary is given to the mansion," Lü E muttered.

"With his appetite, he can barely feed himself," Auntie rolled her beautiful eyes.

That unlucky nephew, she had saved his life and tried to improve their relationship. But that little brat always took the opportunity to provoke her and they just couldn't get along.

As the saying goes, wolves eat meat after traveling a thousand miles, while dogs eat excrement after traveling a thousand miles. It's true.

The steward hurriedly ran over and stopped outside the courtyard, shouting, "Madam, Master is back!"