The northern country is the northernmost country that Lin Feng knows at present, this country is in a cold place, and the land area is very large, so the people in the northern country live very stable, because the zombies here are very slow, and the level is not very high.

And there is a peculiar thing that other countries do not have in the north, and that is the dividing line of the north - the snow line.

To enter the northern country from outside the north, you must cross the snow line, and the snow line is a peculiar thing, just a dividing line of more than ten centimeters, it can produce extremely powerful energy, this energy is emitted from the land, a kind of energy with a cold breath, it completely blocks the cold breath of the northern country within the dividing line, and once the zombie crosses this dividing line, the action will become very slow.

Although the country in the north is peaceful and stable, many bases in this country will be destroyed inexplicably, there is no war, no explosion, just overnight, a base has become a dead city, no one knows the reason, no one has investigated anything, after a long time, the people of the north are used to it.

Lin Feng crossed the dividing line with a team of tens of thousands of people, and some of the weaker people had symptoms of a cold on the spot, because the number of uses of Lin Feng's supermarket had not been initialized, so he planned to wait until the time was up to get some medicines for everyone.

The northern country is vast and sparsely populated, and Lin Feng's team marched for more than three hours before finally seeing a city wall.

From a distance, this city wall looks like an ancient building, but the stainless steel gate shows his age, judging from the height of the gate and the city wall, this base should be about the same size as the original Beishan base, but the gate is open, and there is no sign of people, is it a dead city?

Lin Feng sent the Ma family brothers into the city to take a general look, and the others waited in place for the time being. After twenty minutes, the Ma family brothers came out of the gate and came directly to Lin Feng to report the situation.

"The base has been covered with ice and snow, and it can be inhabited with a little cleaning, and there is no sign of destruction of the entire base, nor is there any trace of blood and zombies, and after a rough measurement, it is found that this base is very close to the size of the Beishan base, which can accommodate everyone."

The Ma brothers reported the situation after the inspection to Lin Feng, and Lin Feng thought it was very good to hear it, although it was relatively cold here, it was also a good temporary place to live.

"Inform everyone, let everyone enter the base in order, and be careful of the trenches on both sides when entering, it looks flat now, it should be filled with heavy snow, so that everyone does not fight, everyone will have a place to live, and there will be no division of rich and poor areas here, so that everyone can rest assured."

Lin Feng asked the Ma family brothers to inform everyone about this, and with a temporary place to live, they didn't have to worry about being attacked by zombies in the wild.

No one is to blame, after withdrawing from the Beishan base, Lin Feng's team has not encountered zombies until now, not even ordinary zombies, although it is a good thing, but in Lin Feng's opinion, this is a very abnormal thing, maybe there will be something more terrifying.

It took everyone three hours to enter the base, and then everyone chose the house where they wanted to live, and after choosing, they were each responsible for cleaning, cleaning the streets and repairing the base gate was the work of the cultivators and guards, Lin Feng and Chief Qian searched for clues in a place similar to the headquarters, hoping to find some information about this base.

After everyone's efforts, it took five hours to clean up the base, and Lin Feng and the others also found a lot of information and a topographic map of this base in the headquarters.

The topographic map is not very useful, but the information is very important, the data records the number and types of weapons in this base, and also records a lot of related information and events, Lin Feng and Mr. Qian read them carefully.

The name of this base is called Nanqi Base, located in the southernmost part of the northern country, it is an important monitoring point in the northern country, the number of armed forces and weapons is very strong, this base has encountered a super-large-scale corpse tide, of which the number of fifth-level zombies is ten, and the number of other low-level zombies is incalculable, such a terrifying large-scale corpse tide, the Nanqi base has eliminated all the zombies with the number of weapons alone.

Reading this, Lin Feng and Manager Qian both looked at each other, and they were all amazed in their hearts that although the scale of this base was not large, the number of weapons was so terrifying, and from the literal meaning, it seemed that this base was related to this country, unlike Shenhua Kingdom, each base was unrelated to each other.

If this base is really related to this country, then Lin Feng will definitely get in touch with other bases in the northern country if he takes over here, so that he can get more information about the Southern Qi base.

But after thinking about it, if the Nanqi base is really so important and so important, why did it become a dead city? The population of this base is tens of thousands, how could it suddenly abandon the city, and weapons and other things were not taken away, this situation is very unreasonable, there must be something hidden in this.

Just as Lin Feng was thinking, Elder Sima took a page of information and said to Lin Feng, "Chief, someone has made an article on this, and it has a strong medicinal smell. ”

Taking the paper from Elder Sima's hand, Lin Feng sniffed it lightly under his nose, it seemed to be like the smell of ammonia, using ammonia on the paper must be to hide some information, but this technique is too low-level.

Mr. Qian sent someone to find a pharmacy nearby, to get a medicine called [phenolphthalein tablets], and then to find some water.

"Chief, what are you doing with these?"

Mr. Qian didn't even know this method, didn't he say that the technology was very developed in this last days, and he didn't even know how to do basic chemical reactions.

"Just send someone to find it, and you'll know what's the use when the time comes."

Manager Qian sent someone to look for it, and at this time, Lin Feng and the others continued to look for paper with the smell of ammonia.

In about half an hour, the people sent out to find the medicine had already returned, and Lin Feng and the others had also found more than a dozen scattered pieces of paper with the smell of ammonia.

Dissolve the phenolphthalein tablets in water, and then gently sprinkle the water on these papers, and after a few seconds, red letters appear on these papers.

Lin Feng was accustomed to this scene, but Manager Qian and Elder Sima were like watching a magic trick, and seeing their reactions, Lin Feng thought of that incident again.

"I don't know about acid-base reaction in the last days, could it be that the person who left this information will travel from his own world?"

Up to now, many things have hinted that there are other people who have crossed over from the original world, but Lin Feng is not sure, if there are clues, Lin Feng vows to find them. (To be continued.) )