Deeper and heavier. The people who were blown by the cold rain in the early morning suddenly woke up for three minutes.

After Lu Chengfeng pondered for a long time, he felt that Wu Jingmo's words were very reasonable, so he continued to analyze:

"I have come to examine the body just now, and the conclusion is relatively consistent, the thirty-two people in Jiangfu did die of the poison of strychnine. From the physical signs of the corpse, it can be inferred that the murderer committed the crime at the time of unitary time. I remember hearing the little beggar's cry for help, it was getting dark and the snow was just beginning to fall. Brother Jingmo, do you know when it started snowing? ”

"Youzheng!" Wu Jingmo said without thinking. Ruixue Zhaofeng Year, every heavy snow in Jinghua City, their Jingzhao Yin Mansion will be recorded, therefore, he is extremely sure that it is Youzheng!

"Then the time of the murderer's crime can be determined within half an hour from the beginning of Youchu to Youzheng! But why did she choose this time to commit the crime? As we all know, Jinghua City has always been closed by Youzheng and opened by Maozheng. She chose to commit a crime when she was a unitary time, isn't she cocooning herself? Lu Chengfeng pondered.

"I have ordered someone to post a notice at the city gate, life is at stake, the matter is urgent, no one is allowed to leave the city unless there are special circumstances! He also sent people to keep an eye at the city gate, and as soon as he arrived at Maozheng, and as soon as there were those who were anxious to leave the city, he brought them back one by one and interrogated them! Wu Jingmo is colorful.

"I still can't figure it out, why did she choose this time that was so unfavorable to herself?" Lu Chengfeng thought about it, and habitually touched his right eyebrow.

Suddenly, his eyes lit up and he asked, "Unless she has some motive for choosing this hour?" Brother Jingmo, when do the people in Jinghua City usually have dinner? ”

"The schedule of each family is different, but most of them follow the sunrise and sunset, and the time for eating dinner is about between the time of unitary time and the time of the sun." Wu Jingmo frowned and replied seriously.

Suddenly, he slapped his thigh and exclaimed, "You mean, she poisoned her dinner?" Therefore, between the beginning of the unit and the beginning of the unitary, it is already the best time to commit the case! If it goes well, she is likely to get out of the city gate before Youzheng! ”

"Brother Jingmo, don't worry, I think she probably planned it this way. It's just that she never expected that she would be bumped into by that little beggar, so she got down the knife and wanted to kill people. Therefore, I think that it may have taken her a lot of effort to hunt down the little beggar, and it may not have been time to slip away. ”

Lu Chengfeng gently patted Wu Jingmo's back and comforted.

"It makes sense, since we infer that she crawled out of this culvert, then where this culvert leads, it may be where the little beggar meets her! Walk! Let's go outside the courtyard wall to see if there are open ditches or waterways! ”

Wu Jingmo came to his senses again, and a spirit stood up, pulled his legs and walked aisle.

"Wait for me!" Lu Chengfeng wanted to get up and follow, but the corner of his clothes was hooked by the branches of the bushes. He bowed his head to break the branch.

But I saw that this low camellia tree, in this cold and snowy land, actually bloomed clusters of pink and purple petals the size of a fingernail, and the leaves were also green, and the fragrance was not very strong, and only after getting closer could you smell the fragrance.

"The peony flower is beautiful and fragrant, and the Ruixiang flower is the best in Phnom Penh!"

This is clearly not an ordinary camellia, but Phnom Penh Ruixiang! Lu Chengfeng had a clever move, calculated his heart, and casually broke off a Phnom Penh Ruixiang flower, and threw it into the culvert, and then caught up with Wu Jingmo in three steps and two steps.

The two finally went around to the northwest corner of Jiangfu, but they were dumbfounded!

This is clearly the most central avenue in the south of Jinghua City! Across the east and west, a flat river! Where there is a trace of a ditch or ditch!

So, the clue is broken again here!

Lu Chengfeng saw that Wu Jingmo was also busy all night.

Wu Jingmo is a scholar, a son-in-law, and a very strict family education, so it is rare to stay up late, and his eyes are already red at this time.

Lu Chengfeng cheered him up and said, "Brother Jingmo, don't be discouraged, I already have a way!" ”

"What else can be done? Listen, the chickens are crowing! It's almost time! Wu Jingmo hung his head and walked on his own, muttering to himself, "Little brother Chengfeng, don't comfort me, let me be alone!" ”

"Brother Jingmo has ever heard of the siphon principle? The difference in liquid level creates a force that fills the tubular structure, and then places the high end of the opening in a container filled with liquid, and the liquid in the container continues to flow out of the lower opening through a siphon. The design of this Jiang house is based on the principle of siphoning. It is not only a good water supply and drainage system, which can be used for flood control in the rainstorm season, but also a good water purification system, which can ensure that the water in the pool is always new and the flowing water is not rotten! ”

Lu Chengfeng dissected the siphon principle he learned in the 21st century middle school physics class for Wu Jingmo one by one. Unexpectedly, after middle school Chinese, middle school physics also played a role!

Wu Jingmo listened to a large part of his words, listened to the clouds, scratched his scalp, and asked in a daze, "What siphon?" Which rainbow? Which sucks? If you don't mind, can you say it again in the next day? ”

Lu Chengfeng had no choice but to patiently translate the siphon principle, and slowly analyzed:

"The siphon principle, to put it mildly, is that when two water surfaces are connected by a long and narrow pipe, the liquid level will generally maintain a flat tendency. The small pool in this river house is the water surface at one end, and the culvert is the pipe that connects the water surface at the other end, no matter which side of the water is higher, the water will naturally go to the other end. ”

Wu Jingmo finally understood a little, isn't it just an old saying, water flows low! is so simple and straightforward that even children understand, but when Lu Chengfeng can say such a flower in his mouth, a lot of paragraphs, which makes him doubt life when he listens to it.

So, he grinned and smiled:

"Okay you! It's really a lotus flower! According to your theory, the two ends must be balanced, so how can you be sure that at this moment, the water is still flowing from the small pond in Jiangfu to the other end? Also, aren't we still going back to the question just now, the culvert can't enter, how can we know where the water of Jiangfu is going? How do you know where the other side of the water is as you just mentioned? ”

Lu Chengfeng knew that he didn't have time to teach him physical concepts such as pressure and air pressure one by one. For the ancients, the principle of siphoning is indeed more complicated, relatively speaking, Wu Jingmo's "water flows to a low place" is very simple and easy to understand.

In short, he can think whatever he likes, as long as he doesn't delay things.

Lu Chengfeng snorted and laughed, and said, "Is Jiangfu Xiaochi entering or exiting the water at the moment, didn't Brother Jingmo see it with him just now?" As for where the water surface is on the other side, we can only rely on it to find out! ”

Lu Chengfeng said, and took out a small Phnom Penh Ruixiang flower from his arms.