When Xiao Yuran took Yang Fan to the study, there were still a few Xiao family members who followed Yang Fan from a distance.

Yang Fan knew that they didn't trust him, but he didn't take it to heart. Originally, he was an outsider.

Xiao Yuran pouted and walked to the innermost part of the study, but Yang Fan began to move in the study.

It's mostly books, and the other items are very simple, and there doesn't seem to be anything that doesn't fit the style of the study.

Yang Fan walked from one bookshelf to another, and before he had inspected more than a third of the room, Xiao Yuran had already taken out a wooden box. Obviously, "Yang's Twelve Needles" is inside the wooden box.

"Hey, you've got everything, it's time to go. ”

"Don't worry, your grandfather's collection of books is quite rich, I'll take a look at it. At this moment, Yang Fan suddenly frowned.

Yang Fan's nose moved, and in the next second, Yang Fan frowned and quickly glanced at the bookshelf in front of him.

Soon, Yang Fan's gaze stayed on an ancient book. It's not because there's anything wrong with the name of the ancient book, but that there is a small piece of something exposed above the ancient book. It seems, a corner of a leaf.

Yang Fan took down the book, flipped through it, and turned to the location of the leaf.

This maple leaf was originally used as a bookmark.

Yang Fan bent down, and his nose twitched slightly. When Yang Fan stood up, he had already confirmed it.

Gu poison is hidden in the smell of this maple leaf.

When the books are closed, the maple leaves are sandwiched between the pages, and the smell does not come out. So the rest of the people who entered the study were all fine.

But when Xiao Chenghu reads a book every day, as soon as he opens the location of the maple leaf bookmark, the Gu poison contained in the smell of the maple leaf will be inhaled into Xiao Chenghu's body along with the smell of the book and the taste of the maple leaf.

After most of the Gu Yin hidden in the maple leaf scent was inhaled into Xiao Chenghu's body, Xiao Chenghu would be hit by the Gu. And the special smell left on the maple leaves is not enough to make another person tricked.

Yang Fan confirmed the way of going down to Gu, but for a while, he still couldn't confirm who was the inner response within the Xiao family. There are too many people who may have entered the study.

Without anyone noticing, too many people have the opportunity to enter the study and exchange this special leaf for the previous ordinary maple leaf.

and Xiao Yuran returned to Xiao Chenghu's bedroom, and the Xiao family had been called away by Xiao Chenghu again.

Xiao Yuran ran to Xiao Chenghu and couldn't help but start to shush and ask for warmth. And Yang Fan nodded at Xiao Chenghu when Xiao Yuran didn't notice it.

Xiao Yuran also knew that Xiao Chenghu needed to rest after recovering from a serious illness, although he was reluctant, after confirming that Xiao Chenghu's body was fine, Xiao Yuran still left the bedroom.

As soon as Xiao Yuran left, Xiao Chenghu couldn't help but look at Yang Fan.

Yang Fan didn't let Xiao Chenghu wait longer: "The maple leaf bookmark of the "Compendium of Materia Medica", the Gu poison is hidden in the smell of the bookmark. ”

Xiao Chenghu frowned, obviously having no clue for a while.

Yang Fan paused, and still asked: "Aside from the situation of the other party quietly entering the study, who has a legitimate reason to enter and leave the study in normal times?"

In a big family like the Xiao family, servants can't run around casually. The servants in charge of other areas appeared near the study, and arranged a few guards near the study, which should not be missed.

Xiao Chenghu recalled, and at the same time said: "There are two servants who specialize in cleaning the study, and the housekeeper Lao Kang often sends me food into the study. In addition, Xiao Yan and Xiao Shu often come to the study to talk to me about things. But during the period before my accident, Xiao Shu didn't come for several days, and Xiao Yan was there every day. ”

Immediately afterwards, Xiao Chenghu began to rule it out by himself: "Xiao Yan and Xiao Shu are impossible, Lao Kang has been with me for decades, it should be no problem, is it those two servants?"

When Xiao Chenghu ruled out Xiao Yan, Yang Fan couldn't help frowning. Who said that it is impossible for children to attack their father? Yang Fan has also seen a lot of bad things in the years of practicing medicine. And Xiao Yan's previous situation of preventing Yang Fan from treating Xiao Chenghu several times also made Yang Fan can't help but raise a trace of suspicion.

Of course, suspicion is a suspicion, and Yang Fan will not casually accuse others when there is no evidence.

Is there a problem with those two servants, and how to confirm the information? These things are not for Yang Fan to take care of.

"Old man Xiao. The Gu Master is backlashing, of course your enemies know. And the other party has found a Gu Master to trouble you, it seems that the grudge with you is indeed not light. Now that the Gu Master has been defeated and retreated, Old Man Xiao still has to be prepared to deal with the possibility of other killing methods. ”

Xiao Chenghu nodded: "You go and call Xiao Yan and Brother Bai in." I'll talk to them about the situation. ”

How the Xiao family guarded against the enemy, Yang Fan was too lazy to care. While the others were discussing countermeasures in Xiao Chenghu's bedroom, Yang Fan stayed outside.

Xiao Yuran worked hard for a while, but he didn't know where to run. Without Xiao Yuran's configuration chat, Yang Fan had nothing to do and opened "Yang's Twelve Needles".

Before Yang Tianyi passed away, he taught Yang Fan a lot of things. So this medical book that is difficult for many Chinese medicine masters, Yang Fan can almost really understand it. It's just that you still need to think about it word by word.

Soon, Yang Fan became obsessed with it. As the name suggests, "Yang's Twelve Needles" is the ancestral acupuncture technique of the Yang family. The content of the first article is very profound. Although Yang Fan can almost read, if he wants to learn, he still has a long way to go.

In just a few minutes, Xiao Yan walked out of the bedroom. After a while, Bai Chonggao pushed open the door and walked towards Yang Fan with a hint of a smile.

"Cheng Hu is full of praise for your medical skills, what have you done?"

For Grandpa Bai, of course Yang Fan has nothing to hide: "Old Man Xiao offended a ruthless person, and he fell asleep before because of Gu." I wasted a lot of effort to help him completely get rid of the Gu poison in his body. ”

"Gu?" Bai Chonggao couldn't help but frown. His old man is also well-informed, but he has never seen the magic of Gu art with his own eyes. As you can imagine, the rarity of Gu masters.

But not having seen it doesn't mean that Bai Chonggao doesn't know about this situation. In their generation, there were a few old guys who died under the poison. Later, after chatting with Yang Tianyi, I learned about the existence of Gu art.

Yang Fan nodded: "Well, so, this time the trouble is not small." Didn't Old Man Xiao tell you just now?"