The two of them carefully examined the map by candlelight, and found four more identical cross marks on it, but there were no signs on Tianzhu Mountain.

Zhang Xiaohu deduced that Chen Yi and the others' Tianzhu Mountain trip would most likely return in vain.

However, the map is incomplete and only depicts some areas. There should be a few more maps of the same kind, but for a few people, none of these are the ones to focus on at the moment.

The place in the middle of the lake is what they need to consider at the moment.

It seems that the next day it will be necessary to borrow a boat from the elder, go to the lake to see, and if necessary, go underwater to check it out.

After the two of them finished discussing, they were also a little tired, so they went back to their rooms to rest.

"Whoa!" The next day, Zhang Xiaohu was awakened by the sound of heavy rain, he looked out the window, the dim sky, the majestic heavy rain, and said in his heart that his luck was really bad, it seemed that there was no way to go to the lake today.

He was a little bored in the room, so he came to Master Wang's room.

"Master Wang, I'm sorry, I didn't expect you to be resting?" After pushing the door and entering, Zhang Xiaohu found that Master Wang was still asleep in bed.

"Yikes!" Master Wang heard Zhang Xiaohu's voice, slowly woke up, and said apologetically: "It's all because I have a bad memory!" I forgot to tell you, after the fishing day in Nanmu Village, it will rain heavily for seven days in a row, I should tell you in advance, so that you can also have a good rest, it is inconvenient to go anywhere this day. ”

Zhang Xiaohu asked, "Master Wang, will this rain have an impact on the neighboring lake?" ”

"Of course, when the rain flows into the lake, the lake rises sharply, and then it is half a year of dry season, when the lake recedes by half."

Zhang Xiaohu was surprised in his heart, there would be such a strange thing, but he soon noticed that it was not good, the water of this lake had changed so much, so how to know the exact location of the center of this lake, whether it was the center of the rising water period or the receding water period! It's not as easy as you think, and it will take a lot more twists and turns.

"Master Wang, does it rain after fishing day every year?"

"I've been here for the past few years, and it's been like this!"

Zhang Xiaohu understands that there must be some law in this, but it is impossible to get an answer here at Master Wang, although he has lived in this village for many years, but for himself, he has always regarded himself as an outsider and has never been willing to integrate into it. If you want to know the mystery of this, which elder do you have to go to the village, it is ashamed to say that it is really rude to come for so long without asking the name of the elder.

Nanmu Village in the rain has a unique view, and the villagers are still the same as usual, unaffected by the rain.

Zhang Xiaohu finally understood why the eaves of all the wooden houses in Nanmu Village were particularly long, originally thought it was just a special design style, but now it seems that it is only because of the abundant rain here, so after the design, the villagers can use the eaves when walking in the rain, and do not need to take other rain gear.

He walked down the corridor under the eaves to the elder's house, and found that the elder was not there, only two children of eight or nine years old, who were cleaning in the elder's room.

Zhang Xiaohu asked where the elder was, and the two children said in unison, "Ice room!" ”

After asking a few villagers, Zhang Xiaohu figured out the location of the ice room, which is the strangest building in the entire Nanmu Village, his above-ground part is completely open, only the ceiling, no walls, down the stairs, the stairs are also built extremely spacious, and at the bottom is a huge ice house, which is used to store food in the village. Many of the fish that were caught the day before, and many of them that were not completely dried were moved here.

As soon as you enter the ice room, you can feel a biting chill. There are many candles lit inside, and the space the size of a gymnasium is lined with neat rows of wooden shelves, and a lot of meat hangs overhead. There was a lot of people inside, and many villagers in thick leather clothes were busy inside.

Zhang Xiaohu didn't see a piece of ice inside, but he really felt the chill, and he didn't know how the people in Nanmu Village did it.

"Huh! How did you get here? The elder found Zhang Xiaohu first, he walked closer, picked up a leather coat that was thrown on the ground from nearby, draped it on Zhang Xiaohu's body, and said, "The temperature here is very low, if you don't wear too much, you will suffer from the wind cold!" ”

Zhang Xiaohu started talking with the elder, he first asked the elder's name, but the elder's answer surprised him very much, the elder turned out to be "Nanmu!" This is the rule that has been handed down in the village, no matter what the previous name is, as long as you become the elder of the village, you must change your name to Nanmu, and after a name for the village, it will make individuals forget their honor and interests, and only have the village and villagers in their hearts, and only in this way can they better serve the village.

Zhang Xiaohu asked Elder Nanmu again why it would rain after the fishing day. Elder Nanmu said with a smile, there is no specific date for this fishing day at all. It's just that earlier the people of Nanmu Village found that there is a rainstorm that lasts for seven or eight days every year, and when the rainstorm is coming, there will be many abnormal phenomena around, the most significant is that the sky will definitely appear two days earlier, and a blue moon will appear at night. The next day, the big fish that used to live at the bottom of the lake will float from the bottom to the surface of the water, and it is easy to catch, and it has been passed down from generation to generation, and it has become one of the most important festivals in the entire Nanmu Village. As for why there was such a series of oddities before the rainstorm, it was not for them to know.

Although I didn't get a definite answer, knowing the origin of this fishing day can be regarded as a harvest. He looked at the food around him, wondering what was going on with the ice house. He was about to ask a question when he heard someone shouting, "Out of the ice!" Out of the ice! ”

He saw that in the deepest part of the ice room, there were seven or eight big men, carefully pulling out a large white block of ice from the crack in the rock.

The surrounding villagers rushed up and used the tools in their hands to divide the ice cubes and transport them to the bottom of the wooden frame according to the specified size.

Elder Nanmu said happily: "This year's harvest is good, and the amount of ice is also very large, it seems that a few of you have brought good luck to our Nanmu Village." ”

Zhang Xiaohu walked to the gap curiously, and saw that the black hole inside did not know where to go, and the crack kept blowing cold wind outward.

"This ice house has a long history with the entire Nanmu Village." Elder Nanmu introduced.

As he was talking, he saw another large piece of ice slipping out of the crack, and the villagers who were waiting outside were about to step forward, but Zhang Xiaohu found a problem.

"Elder, didn't there be any water when the ice melted?"

Elder Nanmu naturally replied, "Of course, if the water appears when it melts, how can we store our food!" ”

Zhang Xiaohu actually knew that this was not ordinary ice when he saw this ice cube, but dry ice, no wonder the entrance here was built so strangely, it turned out that he was afraid that when this dry ice melted, the carbon dioxide concentration in the entire space would be too high, causing other serious problems.

But why does dry ice produce in this rock wall, he knows that dry ice can only condense carbon dioxide into a solid under a certain temperature and pressure, which is commonly known as dry ice, and how does this mountain wall achieve it?

"Knock knock!" Suddenly, there was a strange noise from the crack in the rock wall. It seems to be some kind of vibrating sound.

When the villagers of Nanmu Village heard these voices, they all bent down reverently and saluted against the rock wall.

Elder Nanmu smiled and said, "Haha! Don't look at it, there will be no more ice this year, this year's ice volume is twice as large as last year, enough for us to use for a year. ”

"Elder, this ice melts so quickly, how can it be a year?" Zhang Xiaohu knows that the temperature of dry ice is minus 78 degrees, and similarly, it will melt faster, how can it be used for a year in this environment.

Elder Nanmu smiled and said, "Although there will be no more ice cubes coming out of this rock crevice, this kind of cold wind will always blow to maintain the low temperature here, and it should be enough for a year." ”

Zhang Xiaohu looked at the busy villagers around him, some of them were dividing the ice cubes, and some were picking up food. He knew that he had nothing to do here, so he said goodbye to Elder Nanmu and walked down the stairs back to the ground. As soon as he reached the ground, he felt an itch on his neck, an abnormal air flow from his neck to his whole body, his whole body immediately relaxed, and there was a feeling of dizziness in his mind, the scene in front of him began to blur and shake, he felt as if his consciousness was gradually withdrawn from his body, he wandered in the village against the rain, and in a trance, he actually climbed the wooden wall of Nanmu Village.