Reincarnation Paradise: The Crucible

If you want to artificially change the sky and create a heavy rain that covers most of the city, you must first understand the principle of rainfall formation.

Constantly recalling the knowledge he had learned in the past, Xu Yue looked at the floating clouds around him and reached out to hold a ball of white cotton wool that looked like marshmallows. However, he did not feel any touch, only the wet coldness. After taking back his hand, The palms are already covered with tiny drops of water.

The so-called cloud is essentially a large amount of water vapor that encounters cold air at high altitudes. The water vapor will condense into small water droplets due to the cold. The diameter of these small water droplets is generally only about 0.01 to 0.02 mm.

The tiny size allows these water droplets to be supported by the air currents in the air and thus suspended in the sky. When a large number of small water droplets gather together, they form our common clouds.

As for the formation of rainfall, a large number of small water droplets in the clouds increase in volume after fusion or adsorption. When the volume weight reaches a certain level, the updraft cannot support it, and the water droplets will fall from high altitudes under the action of gravity, causing rainfall.

To sum up, it is not difficult to achieve artificial rainfall, as long as the above two conditions are met.

One is sufficient water vapor, which is the basic condition for rainfall formation.

Dilong Kingdom faces the Chaotian Mountains to the west. The large amount of water vapor blocked by the tall mountains makes most of the territory in a state of sufficient water vapor and abundant water resources. Therefore, the clouds in the sky are always deep, otherwise there is no way to cover the huge size of the Chaser.

Xu Yue stood on the deck of the Sun Chaser, with a pair of purple and coquettish wings spread out behind his back, driving him into the sky.

The wings picked up the wind and waves, and after climbing up, he reached the height of the clouds. Looking down at the fluffy and rolling clouds below, he frowned slightly.

Clouds can generally be divided into two categories: cumulus clouds and stratus clouds. Among them, thick and large cumulonimbus clouds produce the most violent rainfall, and can even lead to thunderstorms.

The clouds at high altitude are now as fluffy and white as cotton wool. From a morphological point of view, these are obviously the most common cumulus clouds. Although such clouds meet the basic conditions for rainfall, they are far from what Xu Yue wants.

Therefore, he still needs to manually replenish a large amount of water vapor. As for how to replenish it, he has already made plans in his mind.

The first condition is met, and then comes the second one. In addition to water vapor, if you want to quickly induce rainfall, you also need to try to promote the rapid condensation of water droplets in the clouds.

To do this, the most common method is to throw a large amount of dry ice, silver iodide, salt and other catalysts into the clouds. These substances will cause the water vapor in the clouds to cool down to form a large number of ice crystals. These ice crystals are the best condensation nuclei. , allowing water droplets to gather to form rainfall.

However, in Earth Dragon Kingdom, a country similar to ancient society, it is basically impossible to collect special substances such as dry ice and silver iodide. There is no conditions and material basis for large-scale synthesis, so he can only use a more cruel method to cause A large-scale forest fire, at the cost of burning the entire forest, produces a large amount of rising smoke as the condensation core of the clouds, thereby triggering heavy rains.

High in the clouds, after reorganizing his plan and confirming that it was generally feasible, Xu Yue leaned back and fell upside down. As his wings flapped, he turned into a purple line of fire and fell straight to the ground. Before he realized the plan, he still Need to go to the capital of Dilong Kingdom.

The capital city of Earth Dragon is named Wujiu City. It was renamed fifty years ago when the national guardian beast was established. Its purpose comes from the 94th line of the Qian hexagram of Zhouyi - or leaping in the abyss, Wujiu.

The rough interpretation is: the dragon may leap into the sky or stay in the abyss. As long as it moves forward according to the needs of the situation, there will be no mistakes.

At that time, the people of the Earth Dragon Kingdom had high expectations for the national guardian beast Long Yuan. They hoped that it would drive the Earth Dragon race to completely transform into true underground dragons, which would also benefit the entire country. However, they were also afraid of the consequences of failure. A series of backlash will bring down the whole country.

Therefore, they named the mythical beast Long Yuan and renamed the capital Wujiu to warn themselves that when they were about to make a leap, they must not act rashly, but should adapt to the current situation and advance and retreat in a well-founded manner. , or fall short, it will not cause too serious damage.

Unfortunately, as fifty years have passed, the predecessors of the previous generation have slowly aged, and no one among the new generation who have taken power seems to have remembered these instructions, leaving only more and more inflated ambitions.

It can be seen from the increasing prices of foreign trade year by year and the covert contact with the biogeneticists of the Sturt Kingdom that the Earth Dragon Kingdom is now impatient.

At the main gate of the capital, Xu Yue raised his head and looked at the word 'no blame' on the plaque on the city gate, with a trace of ridicule flashing in his eyes. In recent years, the behavior of the Earth Dragon Kingdom was completely different from this plaque.

Entering the city, the wide streets were full of people, and the shops on both sides were shouting incessantly. It was very lively. Although the architectural style here is also an ancient Chinese building like Xuanwu Kingdom, it seems much more lively. The passers-by are no longer warriors with knives and swords, but mostly businessmen and scholars in fine clothes and jade belts.

The developed agricultural output has made the handicraft industry of Dilong Kingdom equally outstanding. The richness of tea, mulberry, silk and other raw materials has made commercial development extremely fast. The comfortable and peaceful living environment and abundant and diverse material resources have also made the atmosphere of the entire country improve. It tends to be gentle, so although there are warriors coming and going, most of them are of low strength and do not join the mainstream.

After wandering around the streets of the capital for a few times, Xu Yue had a general impression of Wujiu City. The force value was not high, and the vigilance was even more lacking. During the implementation of the plan, these people should not cause much trouble. Trouble, but the missing biogeneticist from St. Petersburg is a potential risk factor and should be paid attention to.

Now that the enemy's intelligence had been basically assessed, he didn't waste time on it. He turned and walked straight towards a pawn shop on the corner of the street, which was one of the shadow organization's hidden contact points in Wujiu City.

As a worldwide assassin organization, Shadow's contact points are all over the major cities in every country on the mainland, and no one is left out. The location maps of these contact points have been handed over to him by the leader's mechanical servant as early as when he became a Shadow Assassin. .

Pushing open the door of the pawn shop, you are faced with a landscape screen. Behind the screen is a tall mahogany counter. Behind the counter, a thin old man is playing with an abacus. The crisp tapping sound of abacus beads echoes gently in the shop. Maybe he noticed the footsteps. The old man stopped what he was doing, looked at Xu Yue who came in, and said with a smile:

"This guest, you want to pawn something?"

Xu Yue didn't reply, he just turned his hand and took out a square token and handed it over. This token was given to him by Guyu when he was in Xingyang City. Before he got the token of 'Qi', this token would It will always be your proof of identity.

Behind the counter, the moment the old man saw the token, the smile on his face turned serious. He stretched out his hands to respectfully receive the token and began to examine it carefully.

This thing is a proof that only the top 100 assassins in the organization will be equipped with it. He can't help but be disrespectful. In this small and remote country with low national power, such big shots are not common.

His eyes first glanced at the most conspicuous shadow organization logo in the center of the token. It was a pattern like three fishhook-shaped patterns circling each other. His fingers brushed the concave and convex patterns around the pattern. After confirming that it was correct, the old man looked at the quilt above the logo. A font surrounded by gold has the word "salary" written on it, while the other side of the token has the word "fire" written on it.

‘Firefire…’

Thinking of this somewhat familiar code name in his mind, the old man's body trembled, and his face turned pale at first, but then quickly turned red.

A piece of news that just came out from the Xuanwu Kingdom headquarters a few days ago, announcing to all members of the organization, came to his mind.

After the chief rebelled, another shadow assassin emerged, destroying the Bird Gate and defeating the immortal Blackbird. This shadow assassin's codename was Xinhuo.

"Sir, please wait a moment, please wait a moment."