On the day of the war, Zhang Fan still got Mu Huichun's permission to go to the preemptive area of the epidemic, although he was approved, but in order to protect Zhang Fan's safety, Qing Linfeng still took a few children from the medical department to go together, Qing Linfeng naturally has no opinion on this, after all, he himself often comes to investigate.

But what made the accompanying few medical disciples very incomprehensible was why this Zhang Fan had to take such a medicine servant as Huaishan, usually everyone saw that these medicine servants did not have a cold, especially for Huaishan, who has always been an alternative in the medical department, alone, and silent, which is very unpleasant.

Maybe everyone is not very clear about Huaishan's situation in the medical department, the so-called medicine servants are specialized in doing some miscellaneous work, although they are nominally the same children of the medical department, but there is also a strict hierarchy in the medical department, and the lowest level is naturally those medicine servants who are considered to have no cultivation results in the medical path.

As the name suggests, it is already regarded as the position of a servant in the medical department, coupled with Huaishan's introverted personality, it is even more difficult to get along with others, and over time, it seems that Huaishan gives people the impression that this is the case, and the medical department can be roughly divided into medicine servants, medicine boys, medicine chiefs, pharmacists, and ministers.

Among the pharmacists, it will be subdivided into six pharmacists, with one as the respect and six as the bottom, and the establishment of the level is not only to let the world have a rough understanding of the general strength of each pharmacist, but also to inspire the people of the medical generation to continue to study hard, improve their medical skills, and benefit the world.

As for the minister, needless to say, the person in charge of the medical department, and the level of the pharmacist is very different, there are very few great doctors in the entire Lingdu section, Qinglin Feng is one of them, and most of the doctors are still only hovering between the sixth and fifth sections, which shows that even if it is the children of the medical department with the purpose of helping the world and saving people, its competition is also very large.

It's just that Zhang Fan, as a closed disciple of a medical elder like Mu Huichun, naturally doesn't need much to start from, but strictly speaking, Zhang Fan doesn't even have his own rank in the medical department at this time, and at this moment, for the company of the Minister of Qing, several fourth-stage pharmacists of the Spirit Department will not have any opinions, after all, Zhang Fan's identity is here.

But for Huaishan, a small medicine servant, who is not even a medicine boy, how can he be qualified to follow them, this kind of thinking has spread among the children of several medical departments all the way, but because it is Zhang Fan's request, they are naturally not good to say anything, but they will not have a good face.

The first place where the epidemic occurred was a small town located on the western outskirts of the imperial city, called Chishui Town, in which there were no less than 10,000 townspeople, but it should have been a lively and crowded place, but at the moment it was lifeless, and there were only a few people on the street rushing for the needs of life.

Zhang Fan also smiled bitterly when he saw this, he wanted to come here to check the source of the epidemic, he didn't even see how to check it, in fact, this place has long been isolated by the Ministry of Medicine and the royal family, although most of the people here have not been infected, but there have been reports of people being infected, and it is the most serious disaster area in the entire spiritual capital.

Qing Linfeng said: "The people here are not in the town, but have moved to the quarantine area prepared by our medical department in advance, so there are only people here who come and go to supply supplies, so if the junior brother wants to check, he may have to walk through this town to the mountain col behind." ”

"Senior Brother Qing, haven't you touched anything here?"

"No, because it is really impossible to find out what the source of the epidemic is, so when we moved the townspeople, we have tried to keep them from carrying anything as much as possible, after all, the royal family and the medical department will provide them with the materials they need. ”

Zhang Fan covered his snort, feeling a smell in the air that made his nose sore and painful, "This smell is a slowing blood mist," Huai Shan immediately recognized it, Qing Linfeng nodded and said: "That's right, it is indeed a slowing blood mist, it was ordered by the teacher, since the source can't be found yet, but at least it won't let the epidemic spread further, but it's ........."

"But even so, the plague has spread, right?"

Qing Linfeng couldn't help nodding worriedly, although Zhang Fan knew that the epidemic was caused by the depravity of the Ba tribe, but in what form this depravity spread in this town, it was not yet certain, even if it was gas, it would have something to bear, so Zhang Fan began to look it up.

"Senior brother, have the medical departments here fully checked and clarified, or have they not found the source?"

"We're ashamed to have almost searched the town, but we couldn't find anything suspicious,"

Zhang Fan turned to look at Huai Shan, "What do you think?" Several people didn't think that Zhang Fan would ask the opinion of a medicine servant, although Huai Shan was also a little surprised, but he understood that Zhang Fan didn't mean anything else, he was just asking his own opinion, "Since it is already known that it is caused by depravity, it is just a matter of starting with some of the daily burning things of these residents, although there is not only one way to burn that can emit gas, but this is a more commonly used way." ”

"Good. ”

Qing Linfeng couldn't understand the conversation between Zhang Fan and Huaishan, and he hadn't heard of the so-called depravity in Huaishan Pass.

And for the strong spiritual power that Zhang Fan showed this time, even Qing Linfeng was deeply surprised, "Senior brother, junior brother's spiritual power has increased again?

But the result of this strict investigation was a big disappointment for Zhang Fan, judging from the feedback of his own spiritual power, whether it was the firewood burned by the people in this town or some flammable items, there was nothing wrong, according to what Huaishan told Zhang Fan.

Although this depraved gas is a gas, colorless and tasteless, but after all, it is refined from the matter in the deep sea, so its essence is really cold and cold, once this gas appears, or if it is attached to some items, as long as the spiritual power is strong enough, it can naturally be perceived, but the current situation is that Zhang Fan has not found any energy feedback of cold things.

"Could it be that the direction of the exploration of the burning method is wrong?" In the next almost half a day, Zhang Fan explored the entire Chishui Town inside and out, no matter what the item was, even if it was a cockroach in the dark in the corner of the wall, Zhang Fan scanned it one by one, and the strength of the spiritual power gave Zhang Fan a lot of benefits, and the entire medical department took nearly half a month to complete the investigation, and Zhang Fan took much less time.

But this doesn't mean that Zhang Fan can successfully find the source or carrier of the depraved qi, "It's strange, I checked this town inside and out, but I still found nothing, Huaishan, are you really sure that depravity has a cold nature?"

"Well, no matter which ancient book it is, it is recorded that although the infected person appeared to die of extreme madness, after his death, his corpse would show an extremely cold and biting cold, which was not to the extent that the cold body of the deceased could emit after death. Therefore, even if this depravity has not yet been emitted, its carrier has an obvious cold aura. ”

Looking at Huai Shan's determined appearance, Zhang Fan was confused at this time, if this is the place where the depraved qi first appeared, it shouldn't be so traceless, "That's weird, I scanned it with my mental power a few times up and down here, but I didn't find anything abnormal." ”。

"Could it be that we're missing something?"

"I haven't missed anything on the ground, if anything, unless it's underground. Zhang Fan suddenly startled, "Yes, and underground, could it be underground?" After speaking, he spread his spiritual power vertically to a depth of 100 meters underground.