A new day came. Not long after Erbach went to work, Charles came to the principal's office.

"Sit down first, I'll sign a few documents and then talk about it." The principal said while looking at the documents, "You went to the epidemic area, how is the situation there?"

Charles had reported to the principal in advance that he was going to have a meeting in the epidemic area, and he gave a general overview of the situation there.

Professor Erbach was relieved to hear that everything was improving. He watched the movie several times a while ago, and every time he watched it, his heart was heavy.

He asked: "Do you think there is any way to prevent something like this from happening?"

Charles thought for a while and said, "I suggest referring to the waterworks in Slime City in the Slime Basin. Now Slime City has popularized tap water, and all the residents of the city use clean water."

"In addition, the farms in the basin are also promoting small water purification plants. You can also refer to it."

Erbach nodded and asked, "Do you think our academy can design a factory like that?"

Charles immediately replied: "Of course, I designed the water plant. The small water purification plant has been used in my maple sugar refinery for hundreds of years."

Professor Erbach looked up at him, shook his head and smiled: "If you don't tell me, I forgot, I went to your house to play when I was your age, and I even ran to see those pools once. I thought it was boring to look at it and come back.”

Charles said: "I'll donate the design of the water purification plant to the college later. It's not a critical technology anyway."

Professor Erbach thought for a while and said, "You might as well publish it in the magazine "Magic". This plague has had a great impact, so it can make people feel more at ease."

Charles thought for a moment, then nodded in agreement. He said: "I will publish it in the magazine next month. This month is too late."

"Besides, if my paper is published for two consecutive months, someone will gossip if it is discovered in the future."

After the old principal signed the document, he put down the quill, looked at the guy with interest, and asked, "How did you discover the purity of the element? We old guys are only faintly aware of it."

The last paper of the inaugural issue of "Magic" magazine was Charles's "Research on the Differences of Natural Magical Elements in Different Regions and Speculation about a Property of Magical Elements". A mouthful.

Charles smiled and said, "As written in the paper, the water element at the seaside is different from that in other places."

Professor Erbach didn't delve further. He took out two rolls of parchment and said, "I have an old friend who has a big cave in the south. It has been occupied by vampire bats in recent years. He asked me to find someone. to slaughter it."

Charles took the parchment and opened it to see that one was for the territory steward to let him cooperate with the crusaders, and the other was about the Batcave.

After reading it, he took a deep breath. The entrance of the cave was tens of meters high, and it was not known how much distance it went deep into the ground, but it must have been more than a few kilometers.

During this period of time, I don't know how many vampire bats with a half-meter wingspan occupied the place. Whenever evening came, the densely packed bats danced at the entrance of the cave, looking like a dark cloud from a distance.

The surrounding villages have suffered, and livestock are constantly being sucked to death by vampire bats. There are several caravans killed in the wild, and no one dares to go there to do business anymore.

The most troublesome thing about this mission is that there are too many vampire bats, and the entrance of the cave is very large, so there is no way to use the door blocking tactics.

If a few people or even dozens of people pass by, and the overwhelming vampire bats rush over from all directions, if there is no large area of ​​magic, it will be difficult to exert the strength.

Although the local lord is powerful, he lacks large-scale magic as a means of attack, so he can't do anything about these bats.

But this is no trouble for Charles, and it can be solved in half a day.

What he cares more about is the cave. According to the process, there may be some good things in it waiting to be picked up by him.

"I've accepted this task." Charles took the parchment scroll. "I'll set off after a while. If there is no accident, one day will pass, one day will complete the task, and one day will come back."

Professor Erbach was not surprised that he could solve the problem in one day. He thought that when this "vegetative man" had planted pea shooters around the cave, plus a few corn cannons, he would not have enough vampire bats to destroy them.

Someone once wanted to learn this magic from Charles, but he pushed it away on the grounds that it was a gift from the gods.

After taking the task, Charles left the office. He didn't take this kind of small task to heart. After talking to an acquaintance, he came to the airport.

With the restoration of the air route, the transport planes that used to transport supplies for the Knowledge City during the suspension period were much less.

The temporary landing ground outside the Nanhai Farm has been cancelled, and now only the airport built on the open space vacated by the demolished warehouse in the north of the port area has been officially upgraded to a permanent airport~lightnovelpub.net~ Now this airport is mainly passenger transport , At present, there are four direct routes to Bosnia and Herzegovina Airport, Slime City Airport, King Lerik King Cypas City Airport and Charles Family Territory Airport.

There are many people who are interested in the airport now, but how to repair the airport depends on the airline's plan.

Charles took a passenger transport plane that took off at noon to fly to Slime Basin City, which has prospered a lot because of the opening of the route.

As soon as he got off the plane, he found the dragon flight and flew directly to the town near the vampire bat cave.

When Elder Dragon knew that he was going to that place, he had goosebumps and asked, "Why are you going there?"

Charles said truthfully: "I'm going to crusade the vampire bats there."

Brother Julong patted him on the shoulder and said, "If you kill those bats, I'll give you a 20% discount when you come back."

Charles asked strangely, "Why, are you afraid of vampire bats?"

Brother Dragon said: "We hate vampire bats just like you humans hate mosquitoes, get it."

Charles nodded, understanding.

Brother Dragon is very talkative, and he told Charles a lot about vampire bats along the way.

When their dragons need to sleep for a few months, they often find a cave in an inaccessible place, just like an outing or something.

When the dragon is sleeping, the monsters are afraid to approach, but the vampire bat is different. For them, the temptation brought by the delicious blood of the dragon can easily overcome the fear brought by the dragon's might, which makes the dragon very troublesome. .

How wonderful the world is that Charles has to marvel at.

Braves who like to cause trouble to the brave, please collect: () The literature written by the brave who troubles the brave is the fastest.