Fang Er threw the two men directly into the schoolhouse and handed them over to Ma Tongyuan.
Upon returning home, he took out a stack of chemistry textbooks that Chai Yue had copied and had Huang Sheng deliver them.
After that, he paid them no further mind.
Whether they could make something of it depended on their own abilities.
He didn't have the time to teach them one by one.
In the schoolhouse, upon seeing the manuscripts sent by Huang Sheng, Yuan Tiangang reacted as if he had seen a peerless beauty.
He snatched them up and began to flip through them.
As he read, he drooled and chuckled incessantly.
His reaction almost made Huang Sheng think he had delivered the wrong books!
Just as Huang Sheng was about to leave, Yuan Tiangang grabbed him.
One hand held Huang Sheng's hand, while the other gently patted it.
His movements were peculiar, and his expression was lewd.
"Don't be in such a hurry to leave, old man!"
"Please trouble the strong warrior to inform the Marquis of Liaodong and ask him to build a Taoist temple for this old Taoist on the estate."
"The old Taoist wishes to invite all his disciples and grand-disciples to come and study the heavenly book!"
"By the way, strong warrior, would you like to stay and study the heavenly book with us?"
Huang Sheng’s skin crawled.
Did this old Taoist come from Mount Beibei?
He quickly indicated that he would relay the message, pulled his hand free, and turned to run outside.
After Huang Sheng left.
Yuan Tiangang tidied his robes, no longer the same person as before.
He took out a pill from his bosom and looked at Li Chunfeng with a serious expression.
"Chunfeng, take this as my token!"
"Go to all the mountains and temples and invite your uncles and brothers over!"
"Tell them that your master has obtained heavenly secrets! And that you are offering them a chance to comprehend them!"
Li Chunfeng gazed enviously at the manuscripts Yuan Tiangang had placed aside.
He was somewhat reluctant to part with them.
He hadn't even had a chance to glance at them yet.
Yuan Tiangang shook his head.
"You foolish child! Go and notify them first. Once I have comprehended these texts, I will naturally impart them to you. Hurry now, go!"
Li Chunfeng took the pill with a look of disdain.
He had never seen anyone so unreliable!
Using this as a token!
He wasn't afraid that he might mistake it for medicine one day.
After Li Chunfeng left, Yuan Tiangang instantly closed the wooden door.
Hugging the stack of manuscripts, he sat aside and continued to chuckle as he read.
Upon receiving the message from Huang Sheng, Fang Er told him to directly find the young and strong men on the estate to get it done.
It was just a Taoist temple; how many people could this old Taoist find?
At most ten or eight.
Any patch of land would suffice.
In the afternoon, after Chai Yue and Xiao Qing returned from the schoolhouse,
The first thing they said to Fang Er was that a strange old man had arrived at the schoolhouse.
Fang Er smiled and explained Yuan Tiangang's identity, and also reminded them about the matter of the mastermind.
Chai Yue and Xiao Qing almost puked listening to it.
Three days later.
Cheng Yaojin suddenly arrived, looking anxious.
"Brother! Is Daoist Sun here?"
Fang Er pointed disdainfully towards a side courtyard.
"He's there researching urine!"
He swore that from now on, he would never let Yuan Tiangang and Old Man Sun meet again!
Ever since Old Man Sun encountered Yuan Tiangang, who was idly reading manuscripts under the village tree, the two had hit it off!
It wasn't because of Taoist magic!
It was because of that emetic pill!
Cheng Yaojin, unaware of the reason, grabbed Fang Er and headed towards the side courtyard.
Fang Er was somewhat confused.
"What's wrong? Is your wife unwell?"
Cheng Yaojin shook his head, then pointed to the top of his head.
Fang Er followed his gaze.
Wow!
The roots of his hair were covered in small red bumps, densely packed like heat rash!
"What happened?"
Cheng Yaojin scratched his head twice.
"Who knows what happened? The entire Yangwei Army is like this now!"
"We have to wash our hair every night, but the bumps still appear, and it itches terribly!"
As he spoke, they arrived at Old Sun's small courtyard.
He was sitting by the window, looking at something through a microscope. Hearing the footsteps from outside, he looked up at Fang Er and Cheng Yaojin.
With just one glance, he recognized that Cheng Yaojin's complexion was off.
He put down the microscope and walked over.
"Duke of Lu, you don't look too well!"
Cheng Yaojin scratched his scalp again.
"Venerable Sun, please take a look quickly, my scalp is itching terribly!"
"And it's not just me; over ten thousand brothers in the Yangwei Army are mostly like this."
"Even after washing our hair every day after training, it's still no use."
Old Sun's expression turned serious upon hearing this.
He pointed to a stone bench in the courtyard.
"Sit there, and let this old Taoist have a good look."
After Cheng Yaojin sat down, Old Sun parted his hair and carefully examined his scalp.
Then, he frowned and said.
"No head lice, what could be the reason?"
"Let me have a look with the microscope."
Saying that, he turned back to get a glass slide, squeezed a pustule, smeared the contents on it, and placed it under the microscope.
After observing for a while, he looked at Fang Er with some uncertainty and said.
"Marquis of Liaodong, come and see, this seems to be a type of fine worm, but it's much larger than the fine worms found in water!"
Fang Er leaned over and took a look.
In the microscope, several spider-like worms were still wriggling.
Mites!
Most of the overwhelming anti-mite advertisements from his previous life featured these creatures.
The harm caused by mites was also clearly stated.
They fed on human sweat, secretions, and shed skin, and their reproduction rate was extremely fast.
They mainly parasitized human hair follicles and sebaceous glands, such as the nose, ears, scalp, chest, back, ear canals, etc.; scab mites parasitized the superficial layer of human and mammal skin.
High temperature and high humidity were most conducive to the survival and reproduction of mites, and the excrement of these mites caused allergies.
Recently, the Yangwei Army had been training intensely, and with their thick, dark, and dense hair, it was simply a paradise for mites!
Fang Er parted Cheng Yaojin's hair and took a look, then said to Old Sun.
"Venerable Sun, this humble one believes that these worms are causing these swellings."
Old Sun nodded, then shook his head.
"It's not just these worms; some are also prickly heat."
"As Duke of Lu just said, they have to wash their hair every day, yet there are still so many small worms."
"This shows that the reproduction speed of these small worms must be astonishing!"
"This old Taoist will first prepare some medicine. Duke of Lu, please wait a moment."
Then, Old Sun turned and went into the house, brought out the medicine chest.
He took out some medicinal herbs, pondered them, and mixed different drugs together.
After preparing the mixture, he brewed it in a medicine pot.
He dipped a drop with a chopstick and dripped it onto the mite sample under the microscope.
Afterward, he carefully observed the changes in the mites with the microscope.
After a full ten minutes, Old Sun shook his head with disappointment.
"Too slow!"
Then, he returned to the medicine chest to retrieve more medicine, mix it, and brew it again.