"Any poison has its characteristics and ways of action, some are exposed to the outside, and some are obscure, even almost inaudible, silent, tasteless and unconscious, it is the high-end realm of drug production, even if the poison in the body is still undetectable until the moment of death, this is the essence of poison, poison, and poison........"

It was late at night, Zhang Fan was still constantly consulting his Ten Thousand Poisons Black Scripture and the Holy Book of Medicine, this paragraph is the most basic conceptual principle in the Ten Thousand Poisons Black Scripture, even if Zhang Fan can fully understand it, but it is not of much help to the epidemic in front of him, the Ten Thousand Poisons Black Scripture at least records at least 100,000 kinds of large and small poisons in this world, and the reason for their use.

Even if Zhang Fan studied so hard, it was obvious that there was still no progress, but the principle guide of this chapter of the Ten Thousand Poisons Black Sutra at the beginning gave Zhang Fan a lot of inspiration, the so-called epidemic is just a germ and a poison in the final analysis, since it is a poison, it must have its principle and transmission mode.

"Well, since I'm at a loss now, why don't I go directly to the place where the epidemic first appeared tomorrow, and trace the source, I think I can always find some clues. ”

After Zhang Fan made a decision, he also walked out of the medicine room, looked around, it was already late at night, although he was not sleepy, but his body needed to rest, so Zhang Fan still walked back to his room slowly, when he passed by the research room, he was attracted by the light that was slightly floating inside.

"Huh, it's all this time, is there anyone who hasn't rested?"

Zhang Fan couldn't help but enter the probe, but what he saw was a familiar figure, still concentrating on the research table to check the body fluids and cell tissues of the infected people collected, and that familiar figure was none other than Huai Shan, who Zhang Fan had a good impression of before, looking at his concentration, every step was so accurate, and even a large number of medical books were stacked next to him, it can be seen that although Huai Shan usually looks very kind, he still has a strong enterprising spirit in his bones.

And Zhang Fan saw that there were even many of the books next to him that he hadn't had time to see the ancient books of home remedies, which showed that Huaishan's efforts were not lost to any Lingdu disciple, but Zhang Fan didn't understand, Huaishan worked so hard, why was he still just a little medicine servant delivering medicine in the medical department?

"Huaishan is really not an ordinary effort, why didn't Senior Brother Qing and the master notice it? Could it be that Huaishan's efforts are illegal?"

Zhang Fan didn't plan to go in and disturb Huaishan, after all, it was a matter of hard work, since Huaishan decided to make efforts that others couldn't see at this time, it must have his own reasons, and it was probably not appropriate to go in and disturb him now.

Just when Zhang Fan wanted to leave quietly, a piece of things that Huai Shan took out in his hand at the moment aroused Zhang Fan's curiosity and attention, only to see Huai Shan put a white lumpy object in his hand into those samples, only to see a slight smoke rising from Miao Miao.

"This, this smoke is from a sample of an infected person?"

Zhang Fan didn't care about disturbing Huai Shan at the moment, and gradually approached behind him, but at this time, Huai Shan obviously paid all his attention to the observation of the sample, even if Zhang Fan was almost next to him because of curiosity, Huai Shan didn't notice it in the slightest.

Seeing the smoke rising from the sample, and the incredible changes taking place in those cells, tissues and blood, Huai Shan's whole person couldn't help but jump up excitedly, "Great! I finally know what this epidemic is, I finally ........."

"Ahh

What Huai Shan didn't expect was that he couldn't help jumping up happily, but he directly hit his head on Zhang Fan's chin behind him, which made Zhang Fan is pain for a while, Huai Shan suddenly realized that there was someone behind him who was almost not scared and ran away immediately, Zhang Fan hurriedly shouted to Huai Shan: "Hey, Huai Shan, don't be nervous, don't be nervous, it's me, Zhang Fan." ”

"Zhang, Senior Brother Zhang Fan, you, why are you here?" Obviously, Huai Shan thought that it was late at night, and normally no one would appear here again, but Zhang Fan's sudden appearance really scared him a lot.

Zhang Fan rubbed his chin that was almost a little red and swollen, and said with a wry smile: "Me? I happened to pass by when I wanted to go back to rest, and I came in to take a look when I saw you here, wow, I said Huaishan, your kid's strength is really not small, it made my chin swollen, oh~~"

Huai Shan hurriedly kept apologizing, "I'm sorry, I'm sorry, senior brother, I didn't know that you were still here at this time, I'm sorry, I'm sorry." ”

"Okay, okay, don't say so much I'm sorry, I just hit my chin a little, don't be so nervous, I won't blame you, in the end, it's still my fault, I didn't scare you, right?"

"I'm sorry, I'm sorry, I'm sorry........."

Looking at Huaishan's appearance of constantly apologizing, Zhang Fan also smiled bitterly, "Okay, okay, I really don't need to apologize so much, it looks like I'm going to bully you, really, relax, by the way, it's so late, you're still here, Huaishan, you're working hard, but why don't you come to discuss with everyone during the day?"

When Huai Shan heard Zhang Fan's words, he didn't know whether he was happy or scared for a while, his face was uncertain, Zhang Fan smiled bitterly: "Your expression doesn't need to change so wonderfully, do you? Don't you want to say it? If you don't want to say it, don't say it, hey, seriously, what happened to you just now? What are you that can make these samples of infected people who make everyone look at them different?"

Huai Shan also immediately said happily: "Senior brother, I just finally know what this epidemic is, it is not a poison or a germ, but an ancient and hidden artificial gas. ”

"What do you mean?"

Huai Shan picked up the sample of the infected person from the stage again and the small white lump he had just used, "Senior brother, look, this white thing is a crystalline thing called rock salt, which is taken from the abyss cliff that is cold all year round and does not see the light of day, this kind of thing itself is a cold and highly poisonous thing, if a person takes only half a gram of dose, it can coagulate the blood of the whole body and die." ”

"Rock salt? There is a record on the Ten Thousand Poisons Black Sutra, which is often used as a catalytic medium for the refining of high-grade elixirs and spiritual weapons by some alchemy alchemists and refiner warlocks, just because it is not only a cold and highly toxic thing, but also has a lot of cooling and stabilizing furnace fire, so it is not too rare, it may be that my alchemy and refining tools have not yet arrived at home. ”

Huai Shan continued to explain to Zhang Fan: "Although these rock salts are poisons, they are the natural nemesis of these artificial gases. ”

"What exactly is the artificial gas you were talking about?"

"Senior brother can see from some ancient books that in ancient times, there was an extremely rare ethnic minority, the Ba people. ”

"Ba clan?" Although Zhang Fan was stunned when he heard this, Zhang Fan still nodded his shameless head slightly, he can't be faceless in front of his junior brother, right?"

"It is related, because these artificial gases are called depraved gas, which are extracted and refined from some deep-sea thing by the ancient Ba tribe. ”

"Downcast?"

Huai Shan searched for a long time from the pile of medical skills on the side, and only found a very tattered parchment scroll from it, "Senior brother, you see, this is some record of the Ba clan and the depravity, although there are only two sentences of less than a few words, but it also shows that it really exists. ”

Zhang Fan opened the scroll and couldn't help but feel bitter on his face, "What the hell is this dense, little by little thing? This is text? I can't understand any of it!~~."

Huai Shan didn't notice Zhang Fan's embarrassment, but continued to find more fragments of ancient books with different characters for Zhang Fan to see, "Senior brother, there is still this one, Tianshan Fantasy, and this Wu Kingdom's Medical Treasure Book, and this one, and this one............. These are all records of this Ba tribe with only a few words. ”

Looking at the dozens of ancient books with completely different characters in his hand, Zhang Fan's brows twitched slightly, "This, this, these books, you, you can understand them.........