After enjoying Chen Hao's fish banquet, the soldiers returned to their garrison to perform their duties. The night was gray and the stars gradually disappeared. When the wind suddenly broke out in the second half of the night, lightning and thunder and lightning were heard. The flying sand and stones roared by in the city.

Soon after, the heavy rain fell down, like a river of heaven breaking, the strong wind rolled the raindrops like countless whips, whipping the doors and windows hard. Lightning was like a crack in the sky, like a giant python leaping on the clouds, and a thunder exploded in the night sky...

The heavy rain continued to pour out, and the strong wind was mixed with rain and kept beating the ground. After only half an hour, the entire Liangzhou City had already accumulated water. On the other hand, there were even more ravines and flowing water overflowing outside the city.

Shi Xiong was still guarding the city on the city tower, and did not slacket off the storm. Shi Xiong, who had been in charge for many years, naturally knew that this was the best time for the enemy to attack, but Shi Xiong knew in his heart that at this time, the enemy might not be able to protect himself and would not have the intention to attack the city, but to prevent him from guarding the city.

At this time, Shi Zhong, who was standing beside him, patting the straw raincoat on his body, and couldn't help but exclaim: "Father, do you think the Grand Marshal is a reincarnation of a god? He had expected that there would be heavy rain after midnight, and he also specially made a large number of straw raincoats for the soldiers..."

It turned out that after the soldiers enjoyed Chen Hao's fish feast, Chen Hao asked Shi Xiong and others to bring the straw raincoats prepared in the past few days, saying that there should be heavy rain at night. At that time, it was bright moon in the sky, and Shi Xiong and others did not believe that there would be heavy rain at night. However, since it was the hero who was full of affection, everyone was not willing to refuse, so they brought a large number of straw raincoats for later use.

As a result, what Shi Xiong and other generals did not expect was that the sky suddenly changed after midnight. On the night before, when the moon was still shining, there were dark clouds and thunder rolling in the sky, followed by a downpour of heavy rain that broke the dam and fell to nine days. At this moment, everyone began to be glad that they had already prepared the straw raincoat, otherwise a large-scale soldiers would have fallen ill after the heavy rain.

Shi Xiong stared blankly at the dark outside the city, letting the rain hit him, but his eyes burst into excitement: "I don't know if he is reincarnated as a father, but with a capable man who is as wise as a demon and a civilized and martial arts, it is a great blessing to be the commander of our army!"

Speaking of this, Shi Xiong's eyes fell on the moat outside the city that had been twice as widened, and then said admiringly: "The day before yesterday, the Grand Marshal ordered his father to dig deep and broaden the moat. At first, he thought it was unnecessary. After all, it had not rained heavily in the west road of Shannan for a long time. Now it seems that the Grand Marshal has already planned that the moat will be filled with river water after this heavy rain. With this barrier in front, Liangzhou City has another guarantee!"

"Hahaha, this heavy rain is a fatal blow to the Southern Barbarian army. I wonder how embarrassed the Southern Barbarian camp is at this moment!" Shi Zhong looked at the dark night outside the city, and his face showed a relaxed and joyful look. The tents of the military camp are no better than those of the city residences, especially the strong wind and heavy rain, which is a big blow to the marching military camp.

...

It was still unstoppable after three hours of heavy rain. A cool breeze in the morning blew away Chen Hao's hair. Chen Hao stood in front of the window and looked at the heavy rain, with a hint of undetectable bitterness on the corner of his mouth. At this time, Shi Zhong was wearing a straw raincoat outside the courtyard and asked to see Chen Hao. Seeing this, Chen Hao signaled Shi Zhong to enter the room and talk.

When Shi Zhong entered the wing room and saw that he wanted to speak but stopped, Chen Hao said in a deep voice: "I came to see me early this morning. Do you have any doubts and need me to answer for you?"

Shi Zhong was slightly stunned when he heard that he was a little surprised and couldn't wait. He asked straight to the point: "Master, I will want to know how you knew there would be a heavy rain last night?"

"This is the question you need to ask urgently?" Chen Hao turned around slowly, then looked at the heavy rain outside the window.

“That’s right!”

"Actually, this question is simple and simple, it is just a law of all things!" At this point, Chen Hao pointed to the gray sky and said softly: "There is a folk proverb, clouds face south, rain forms a pond; clouds face east, and empty. The meaning is self-evident. Looking at the clouds, you can know whether this heavy rain can fall into the nine heavens, and looking at the shape of the clouds, you can know whether there is wind... If Major General Shi observes in recent days, he will definitely see some clues?"

Well, Shi Zhong stood there blankly, thinking that he had no intention of looking up to observe the clouds all day long. Even if he lifted his neck so hard that he had cramps, he couldn't see that the clouds would rain. Do you think everyone was like you?

Seeing Shi Zhong stunned there, Chen Hao continued to say without caring, "The weather was extremely stuffy these days. Although it was already summer, it was a bit abnormal. Yesterday, you and me were fishing by the pond, and the fish jumped and bubbled very frequently. This was a hint that it was about to rain heavily..."

Chen Hao really wanted to say something about aerobic breathing. The fish could not breathe the oxygen in the water, so that they would jump and bubble. But they swallowed the words back to their mouths, and he knew that even if he said it, no one would understand.

"Ah! So..." After Chen Hao reminded him, Shi Zhong remembered that yesterday was indeed as Chen Hao said.

"These are second. Today is May 25th. According to folk customs, it is called "Old Dragon King Talking Mother" and it is a period of rainfall! Moreover, my Tang Dynasty has been drought and rain for a long time since the beginning of spring. Now many signs of rain gather together. If there is no rain, it would be a strange thing! This rain is not only as violent as a mountain torrent, but it will definitely not stop in the next few days!"

Shi Zhong listened to Chen Hao's analysis and was very relished. It was the first time he heard many things, as if Chen Hao in front of him was really omniscient, so he admired: "The General is indeed aware of astronomy and geography. No wonder the general said yesterday that the enemy would not attack the city in the next few days. With such heavy rain, the enemy is now unable to take care of himself! It's a pity that our army lacks enough troops, otherwise it would be said that his position was in chaos and sneak attack..." At the end, Shi Zhong showed regret.

Chen Hao just smiled but did not respond. In fact, these are not tied to astronomy and geography at all. These are just the experiences summarized by later farmers in order to grasp the farming season. How could these families of officials and generals know and understand the role of folk proverbs? This reminded Chen Hao of a very realistic example in later generations. When the children in the city went to the countryside, they could not distinguish between leeks and green wheat seedlings.

Although Chen Hao had been planning this heavy rain, when the heavy rain came, Chen Hao felt a little bitter in his heart. This heavy rain was a disaster for the enemy, but for Li Qian and deputy general Li Hong, it was also a disaster for the shortcuts through the steep mountain road.
Chapter completed!