My Lord, the princess doesn't want you anymore.

She was shocked again, pointing at a bent needle and asking, "Master Wang, when you helped my servant sew up his wound before, was this the needle you used? But the shape of this needle is so strange, can I take a look?"

Wang Li did not hide the truth, "I have saved countless lives in my life and have seen many patients with relatively large wounds. I wondered if I could sew up the wounds like sewing clothes. I used sewing needles at first, but because human skin and flesh are not as easy to fold as clothing fabrics, sewing needles are not easy to operate and can easily cause further trauma. So I had people make needles with various curved angles. After repeated experiments, I found that needles with this curved angle are most conducive to suturing ordinary wounds."

"Uncle Wang, you are truly a genius." Although Mei Xueer was shocked, she was still unsure of his identity, origin, and whether he was an enemy or a friend.

Although she felt respect, she did not dare to reveal her origins too hastily.

What if he was just a medical genius of this era, and not a time traveler like her? Besides, besides being a doctor, did he have any other identities?

Before these issues were clarified, Mei Xueer was extremely cautious.

"I've heard before that Miss Mei has extraordinary medical skills and can even perform autopsies. To be honest, I've always wanted to discuss medicine with you in depth. Come, sit down, and let's talk slowly while we drink tea."

Mei Xueer nodded obediently. Just as she sat down, she heard an urgent shout from outside the door, "Dr. Wang, Dr. Wang..."

Soon, the little medicine boy ran in anxiously, "Forget ancestors, there is a patient."

"Take it to the next room and deal with it on your own." Wang Li waved his hand and didn't care too much.

Mei Xueer couldn't help but be moved: this medicine boy is only about ten years old, but he can treat patients independently?

Wang Li glanced at Mei Xueer and said, "Let him practice. Only when children practice more can they learn real skills."

That's true.

But Mei Xueer really wanted to see how the child would do.

But Wangli had no intention of getting up, as if he was very confident in the medicine boy's medical skills.

"May I ask who is Miss Mei's master?"

"This..." Mei Xueer responded: "My master has passed away a long time ago. He didn't want others to know his name..."

"I understand. Then I won't ask anymore." Wangli picked up the teacup and secretly glanced at the young woman opposite him over the rim of the cup, his eyes dark and unclear.

"I saw a case of a patient in Uncle Wang's book before. He looked like an old man at the age of 20. I was very curious about how such a disease could exist in the world. Unfortunately, the book did not record the cause and treatment of the disease. I wonder if Uncle Wang has found out the origin of this disease."

A trace of complex emotions flashed through Wang Li's eyes again. He calmly put down the teacup, sighed deeply, and said, "Miss, have you ever heard of the Nanyue Kingdom? Judging from your age, the Nanyue Kingdom should have no longer existed when you were born."

Mei Xueer had no expression. "I've heard of that. I've also heard that the people of South Vietnam are the best at medicine and witchcraft. Could it be that the cases recorded in the book are related to South Vietnam?"

Wang Li nodded and said, "I also traveled a lot, searched for countless medical books about South Vietnam, and visited many people, and only then did I learn a little bit."

According to Wang Li, he met this patient while traveling around when he was young, but he could not find out the cause of the disease, and ended up watching the man die in front of him.

For more than a year, he searched for clues related to this disease in South Vietnam. Finally, he learned that this person was drugged by someone named Yi Yan.

"As for why this man took this medicine, I have no idea, but I found out that Yi Yan is a banned drug in the Nanyue Witch Doctor Department. Miss, do you know why this poison is called Yi Yan?"

"As the name suggests, I think this medicine can change a person's appearance." Mei Xue'er was a little surprised. "Is there really a way to change a person's appearance in this world?"

"There is no such medicine in the world, but the voodoo of South Vietnam can do it." Wang Li said: "To be precise, Yi Yan is not a medicine, but voodoo. It is a kind of poison made by the Witch Doctor Department by combining poison and witchcraft. Because it is too insidious, it is listed as a banned drug. For example-"

He pointed at Nan Xing who was standing beside him and said, "If you use this girl's blood as a guide and then mix it with this poison, and you take it, your appearance will become that of this girl. This only applies to people of the same gender."

"However, people who take this poison must take it at most once every seven days. Of course, blood is only needed as a guide for the first dose, and not for subsequent doses. If the drug is stopped, the person will age rapidly, and then die. Even the most skilled coroner or doctor can only conclude that the person died of natural causes, because there is nothing wrong with the body of the deceased. Moreover, even if the person insists on taking the drug, his life span will be greatly reduced. Counting from the first dose, he usually lives no more than three years, and at most five years."

What Wang Li said was much more detailed than what he recorded in the book. Mei Xueer was 100% sure that Liu Piaopiao must have taken this Yi Yan.

It is certain that this Liu Piaopiao is not the real Liu Piaopiao.

Who is she? What is her purpose in becoming Liu Piaopiao and lurking in the Mansion of Marquis Zhongde?

What is her purpose in approaching me again and again?

"Miss Mei--" Wangli called out twice before pulling Mei Xueer out of his thoughts.

"I just think that this poison is indeed insidious. No wonder it is listed as a banned drug." Mei Xueer's voice trembled a little.

"Yes!" Wangli sighed, "From a doctor's point of view, poison can also save people. But this poison can only harm people."

"Then Master Wang, do you know if there is anyone in the world who can make this poison?"

Wang Li shook his head. "As far as I know, on the day when Nanyue was destroyed, the entire palace was burned to ashes. The formula of this poison disappeared along with the Witch Doctors Bureau. Also destroyed were the prescriptions of countless secret medicines in the Witch Doctors Bureau... What a pity, what a pity, many of them are indeed good prescriptions for curing diseases and saving lives, but they have been lost. What a pity..."

Wang Li looked gloomy.

Mei Xueer could understand it very well. As a doctor, it must be heartbreaking to see so many prescriptions for curing diseases and saving lives being destroyed.

However, since Yi Yan is no longer in the world, where did Liu Piaopiao’s medicine come from?