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It was about Huang Xu's life and death, Huang Zhong was extremely nervous and concerned.

Xu Ding didn't bother him either, because this is the most basic mentality of being a father, so he patiently explained: "I need to take a drop of Huang Xu's blood."

It turned out to be the case, Huang Zhong said: "Xu'er cut his finger with a knife, so don't bother your lord with such a trivial matter."

"It's father!"

Huang Xu was a very well-behaved child. Hearing this, he pulled out the dagger on his waist, and then lightly swiped his left hand across the stomach.

Even though he was extremely weak at this moment, the movement of holding the sword was done in one go, and the strike was bold and sharp, without any hesitation.

If this goes on, there will definitely be a dim sum season.

The tiger father has no dogs and sons, given time, this is bound to be another general.

Huang Zhong said: "Your Majesty can take blood now."

Xu Ding said: "Good!"

Xu Ding reached out and touched Huang Xu's index finger lightly, and then said: "Okay, just take one drop, stop the bleeding quickly."

After speaking, Xu Ding said to Xiao Liu: "Xiao Liu, take a blood test!"

"Okay master, please wait a second."

One second after Xiao Liu finished speaking, he said again: "Master, the analysis has revealed that Huang Xu's blood contains mercury exceeding the standard."

Excess mercury?

It turned out to be the case.

Xu Ding rubbed Huang Xu's drop of blood with his index finger and thumb and said, "Han Sheng, the poison Huang Xu was poisoned by is mercury."

汞？

What is this?

Huang Zhong and the others were at a loss.

Xu Ding took the membrane cloth that Huang Wudie handed over to wipe off the blood between his fingers and said: "You may not have heard of this thing, but you must know cinnabar."

Cinnabar!

In this way, Huang Zhong and others understood.

Cinnabar is a medicinal material that has the effects of calming, calming the nerves and sterilizing bacteria, so ordinary people also use it.

The people who use it the most are warlocks, and they like to use it to make alchemy.

And the old man Huang Lao's technique is quite popular.

There are not only warlocks who practice alchemy, but also aristocratic families and royal families who like to do that stuff.

For example, Guo Jia likes alchemy, and will eat it after refining it.

It just so happens that the main component of cinnabar is mercury, with a content of about 80.00%.

People exposed to it for a long time are naturally prone to chronic mercury poisoning.

"Is this thing actually a poison?" Huang Zhong and the others were a little confused.

Xu Ding said: "A small amount can be used as medicine, but a large amount can be used as poison. It needs serious use and should not be exposed to for a long time."

"Then is there any way for you to cure this poison?" Xu Ding found out Huang Xu's cause, Huang Zhong was a little bit happy, and asked quickly.

Xu Ding shook his head and said, "I don't have the method to detoxify, but I know who should be able to detoxify."

"Who is it? Please tell me, Junhou? Zhong must be very grateful, and I will stand up for you." Huang Zhong knew that his son was saved, as if he had grasped a life-saving straw in despair, he was willing to pay all the price for it.

Pity the parents of the world.

Xu Ding hurriedly helped Huang Zhong up and said, "Han Sheng doesn't have to be like this. Since I know who can solve it, I will tell the truth, and I just want to find him. Choosing a day is worse than bumping into the sun. Is it okay to go south today?"

"It's all up to you!" Huang Zhong said excitedly, he wished he could fly to the doctor right now.

What Xu Ding thought could cure Huang Xu was actually Zhang Ji, Zhang Zhongjing, a famous contemporary doctor who was as famous as Hua Tuo.

Huang Zhong's family was originally poor and had nothing of value, so everyone set off for Changsha after closing the door.

Zhang Ji's family has been officials for generations, and they were made officials by Xiaolian very early, because they were first-class because they were excellent in the examination, and then they were sent to the local officials to become officials.

At this time, he was working as the prefect in Changsha.

But because he still couldn't let go of medicine, he has been specializing in internal medicine and typhoid fever.

Therefore, on the first and fifteenth day of every month, the official office will be opened to justice for the common people.

But when Xu Ding and others came, it was not the first and fifteenth day of the new year, so he wanted to enter the government office, but was blocked by the gatekeeper.

Xu Ding waved his hand, and Dian Wei stepped forward and mumbled, "Go in and report, and tell the governor of Donglai, Marquis of Weihai, to see you."

Prefect?

Marquis of Weihai!

The gatekeeper took another look at Xu Ding after hearing the words, and then ran in to report.

Not long after, a man in his thirties came out wearing an official uniform, with a medium build and a thin face.

The man came out and glanced at Xu Ding and the others, then fixed his eyes on Xu Ding, and asked Shili, "I don't know which one is Xu Junhou."

Xu Ding came out and said, "Xu Ding! I've met Mr. Zhang!"

"Junhou is really young and handsome, with extraordinary bearing, please!" Zhang Ji looked at Xu Ding again, nodded slightly, and then made a gesture of invitation.

Xu Ding said: "Master Zhang please first!"

This time Zhang Ji was not being polite, he took the lead and walked in front, but he slowed down his pace so that Xu Ding could keep up with him.

All etiquette moves around, without distinction.

It can be seen that he is a rigorous person who pays great attention to details.

Xu Ding secretly praised.

Sure enough, he is a well-known doctor.

Entering the living room, Zhang Ji asked: "I don't know what is the important thing for the Lord to come here?"