The junction of Nanqiu and Chifang.

On Tubao Mountain, the big dragon was transported by the concubine, and the highest mountain was inserted with a weather vane.

"What is this?"

Danju was commissioned by Yu Zai to make this strange thing, and Yu Zai inserted this wood-copper composite weather vane high in the top of these hill bags.

The arrow on the top is in the shape of a goo.

"Ah, this is just a thing to measure the direction of the wind, just like I told you last time, this one is nothing special, it just always points to the source of the wind, look at this thing, you don't have to manually take the leaves to find the source of the wind...."

During the Xia and Shang periods, people already knew that hanging a long strip of cloth on the head of the flagpole, when the wind blew, they could see the direction, which was called "Ling" at that time, and this thing was the ancient version of the weather vane.

However, the strip of cloth is relatively soft and is often blown around by the wind in an uncertain direction. So the ancients changed the strip of cloth to the feathers of birds. The middle of the bird feathers is elastic and does not shake when the wind blows.

In the Han Dynasty, Zhang Heng, a famous master of black technology, created a new version of the weather vane, which is called "Xiangfeng Wu", which is a crow made of copper, installed on the head of the pillar, after the wind rises, the head of the crow will point to the direction of the wind.

And the most powerful weather vane in the ancient version is the iron phoenix on the Yuanjue Temple in Taiyuan, Shanxi Province in later generations.

So this thing is rare, but the principle is very simple.

When I used to work, I didn't come into contact with this thing, and it was more common in the plateau pastoral area....

Yu Zai looked at another stone tablet on the top of this mountain, which was a weather gauge, since the Taihao clan implemented it, most of the tribes would make this thing, which was nothing more than the measurement of some important climate and the record of judging the time.

The main function of the wind and rain table is to help the agricultural civilization to observe the celestial phenomena, avoid bad weather such as wind, rain and thunder in time, and prevent the impact on the planting and harvesting of grains.

The dragon was brought here because it had the ability to ask for rain, and Yu Zai brought a lot of people today, but most of them were on the mountainside.

After observing the direction of the wind and air in the vicinity, Yu Zai pondered carefully for a while, and then shouted downwards to get the big guy ready to start digging the roots.

The roots of the tree fix the soil, dig up some of the roots, will cause the soil to not be too closely connected, and then cut some wood every few steps, and when the heavy rain comes, this part of the mountain will also be more prone to flash floods and collapse due to sparse vegetation and soil erosion.

The causes of flash floods are not complicated, and the flash floods in many places in later generations are actually inseparable from the indiscriminate cutting of trees, and now, there are red pine nuts and dragons, turning heavy rain into torrential rain on heavy rainy days, which is no problem at all.

But Yu Zai didn't plan to let his teacher go into battle with his arms at the beginning, as Dayi said, if none of them came, then what else did the tribe have now?

The answer is already there.

The dragon is not strong, the tribe can completely rely on its own ability to subdue, it is not comparable to the old turtle, and now as an important labor force of the tribe, the dragon's ability to ask for rain can come in handy in this battle.

"It's not a fight. ”

When asked about the preparations for this battle, Yu Zai responded to the people who asked about it.

"It's a disaster, and we're just trying to protect our home. ”

Whether it is the Earth Lords trying to attack the South Hill, or the flash flood that is about to destroy the Earth Lords, this is indeed a disaster.

"Fighting? The number of people is not equal, why is it called a battle?"

After measuring the direction of the wind, Dan Zhu pointed to the southwest under Danzhu's gaze!

"Within five days, there will be heavy rain from the west, and autumn water will come in season!"

It has been found that the breath is damp before, and as a qi refiner, under the teaching of Chi Songzi, he is very sensitive to changes in qi, and the water level of some nearby water currents has begun to rise, and the water body has gradually become turbid, and the pressure on the weather vane is very great.

The southwest sky was a little dark, and the wind flow was not normal.

The vigor of the birds decreases, and the insects begin to appear in large numbers, but they quickly become hidden.

Most noticeably, the nearby ants began to panic.

Tremendous pressure is approaching, and the heavy rains of autumn come according to the season, and after this heavy rain, the weather gradually becomes colder, but in the south and Lingnan, this change is not noticeable, or even none.

As a result, the heat at the end of summer and even at the beginning of autumn is still abundant.

The people of the Chifang clan began to dig the roots of the trees in the mountains, and the horn of Youhou was carried by Dayi, and with that stone gall, the torrent could be used to rush down the route that Yu Zai wanted.

"The heavy rain in the south had stopped in the last two days, and the earth should have been unable to hold it back. ”

Yu Meng came back from the south and told Yu Zai that the big monkey seemed to have called for help, and strange cries began to come from the direction of Tianbi Mountain, like ..... Like a baby's cry......

"There is a strange beast in the south, called Gu Eagle ....."

Red pine nuts are popular science in time: "Gu carvings cry like babies, and they like to eat people the most." ”

"It seems that this big monkey god really found a rescuer. ”

Yu Zai muttered, and was very helpless.

You're strong enough, okay, why are you still looking for rescuers!

Do all the monkeys like to ask for help? Who did you learn from this stinky problem?

When the reinforcements arrive, wait for me to attack from both sides, outflank and encircle, rush left and right, break the enemy's army, and win this battle.....

You're thinking about peaches to eat.

Yu Zai has made so many preparations here, just to prevent being taken away by the other party in waves, after all, the Earth Yu clan is very powerful, with the Chifang clan's manpower, this is not an opponent at all......

As for the reinforcements, they were also invited, but it was just like this, and the various tribes only knew that the Diyu clan might have done it, but the specific time was unknown.

The main reason is that the time is too short, the distance is too far, people like Dayi are fast, but others can't.

But fortunately, reinforcements were already on the way, and Sanshan Siye was the first to respond, saying that they would send someone over.

"Reinforcements from the three mountains and four fields have come from the short road, and they should arrive in the next three days or so. ”

"As for the reinforcements of Tokotoyonono, it will be much later. ”

Danju looked at Yu Zai, who had made a plan in an orderly manner, and fell into a brief contemplation.

Although I thought it was absurd for Yu Zai to change the river course, after this period of observation, I found that Yu Zai, a little wizard, did have two brushes.

The understanding of climate and hydrology is, in Danzhu's view, enough to enter the central water conservancy department.

"One more thing. ”

Danzhu spoke: "I speak more ugly...... Zai, although it is said that the layout here is very perfect, but if the other party does not go from the wilderness of Shanbo, but takes a long detour to the side, what will you do?"

"Wars are not won by mental whims. ”

Yu Zai said: "Ah Hong, you are right, so, I am going to send a team of bait ......"

Danzhu nodded seriously: "Bait, yes, but you have to ......"

Yu Zai took out a wooden plaque and stuffed it to Danju.

The wooden sign reads, "Akakata Clan ahead, this section of the road is under construction and maintenance."

and carved a sheep's head of a lamb.

Danzhu was a little confused.

And Yu Zai said that according to the character of Shandu God, if you don't let him come, he will definitely take this road!

And Yu Zai specially asked Dan Zhu and Yu Pan to go together.

When the barbell meets the barbell......