"This-" Zhang Yitai blinked his eyes and said with some disbelief, "It's the same principle as that piece of paper with the lid of that water cup?" ”

Zhu Youxiao nodded as a matter of course and said, "Yes, the principle is the same. He also wanted to build a water spray truck that could spray water out of the tank — ten paces away, and use it to fight fires. ”

The originator of China's fire truck should have appeared in the Qing Dynasty, and it was also the principle of pumping and pressurizing, using manpower to spray water out of more than ten meters for fire extinguishing.

Zhu Youxiao didn't just think of extinguishing the fire, he also thought about spraying fire oil to burn Jiannu!

This is the flamethrower of the Daming brand, whew, whew, whew, one by one the fire dragons swept over, turning Jiannu into a fire man jumping around, squeaking and screaming, exuding the smell of barbecue, isn't it very visually shocking?

Wang Jizhong circled around this game several times, and looked left and right without figuring out what the principle was.

You don't care if it's simple or not, or how useful it is, it's a skill to be able to make it. To put it bluntly, this thing is indeed useful, better than throwing a bucket into a well to carry water.

"Admire, admire." Wang Jizhong bowed his hand to Zhu Youxiao, "If you can apply what you have learned, Brother Shen will be far better than us." ”

"Little plays, maybe useful, don't dare to accept Brother Wang's praise." Zhu Youxiao was humble, turned his head to Chen Zilong and said, "Brother Chen, stop and rest!" ”

Chen Zilong doesn't look like a scholar, but he has the strength to do it, and after pressing it so much, the bucket is almost full, and he doesn't pant or sweat.

With a hearty laugh, Chen Zilong stopped his movement and said with a smile: "This thing is full of fun." Only if Brother Shen is as smart as he can study the principles that are transparent. And so far, I haven't figured it out yet! ”

Of course, you don't understand, Magdeburg didn't think of the hemisphere experiment, I just stood on the shoulders of giants.

Zhu Youxiao smiled and said, "I didn't figure it out by myself. If you are interested, you can rest assured that you can study in the new school and get in touch with more advanced science. ”

Xia Yunyi looked at Zhu Youxiao and asked in some surprise, "Science?" How did Brother Shen define those principles? ”

Under the gaze of everyone, Zhu Youxiao nodded vigorously and said: "I think that it is science that promotes social development and is also an important condition for the country's prosperity. ”

After a pause, Zhu Youxiao stretched out his hand and asked, "It's cold outside, let's go inside and talk!" ”

Chen Zilong and the others nodded yes and re-entered the hall.

They now have a further understanding of Zhu Youxiao, although there are various speculations about his identity, but every time there are refreshing remarks, they are becoming more and more attractive to them.

…………………… Divider...........................

Boom, boom, boom...... Successive explosions kicked up dust, snow and dirt, and a mess of things that rose into the air in black smoke.

After two days, Jiannu launched an attack on Ningyuan City again.

If you dare to attack again, you will definitely have something to rely on. Xiong Tingbi stood on the city, looking at the enemy with a telescope, observing their new tricks and new tactics.

The coating pushes the cart in front, which has not changed. Then came the archers, and so it seemed. Except for the change in the direction of attack to Seongnam, there seems to be little change.

The cart was pushed to the front of the trench, but the coat was not filled. In the middle of the night, a canopy rocket flew up in the air, like a flock of fire ravens in the air, and pounced on the stake array.

Oh?! Xiong Tingbi raised his eyebrows, and the corners of his mouth curled. This can be regarded as a new method of warfare after learning a lesson, using fire to burn the stake formation.

The rockets fell into the array of stakes, some of which were stuck in the snow and quickly extinguished; Some hit the stake and burned slowly. As the rockets continued to be launched, the fire in the pile array also grew.

Not bad, although it was a little slower, but it reduced the casualties of musket fire and thunder bombardment in front of the stake formation.

Xiong Tingbi put down the binoculars, thought for a moment, and did not give any orders. If the soldiers in the trench were ordered to extinguish the fire, they would inevitably be killed by bows and arrows, which was what Jiannu wanted.

What if the stake array burns down? For this purpose, do you want to take the rebuilt cart, the coat of the cart, and the archers in the back?

Except for the burning stake formation, the rest of the scene seemed to be a repeat of the previous attack.

The bomb throwing carts and artillery of the Ming army were bombarding, destroying the carts and killing and wounding the enemies behind the carts. But Xiong Tingbi felt that Jiannu should have a back-up move.

Xiong Tingbi thought for a while, then turned his head and instructed the herald: "Tell Jin Guofeng to prepare to retreat to the two wings; Then send an order to Zu Dashou and Huang Degong, and be ready to respond when the defenders in the south retreat. ”

Seeing the herald running away, Xiong Tingbi gave another order to transfer troops to the city and strengthen the defense of the city. After making these preparations, Xiong Tingbi put his mind at ease.

The defense facilities of Ningyuan City are so complete, even if Jiannu is put under the city, how can they break through the city, it is obviously impossible.

Of course, Jiannu, who was approaching the city, could shoot with a bow and arrow. But what advantage can they take advantage of the condescending musketeers in the city?

Four or five miles away from the frontline battlefield, Nurhachi listened to the continuous back and forth reports of the Tanma, and there was no expression on his face.

Fan Wencheng next to him was a little nervous, pricking up his ears to listen to the battle situation in front of him. The idea is his, whether it succeeds or fails, of course, has a great influence on him.

Speaking of Fan Wencheng, it will completely collapse the bloodline theory of "Lao Tzu's heroes and heroes". Because, he turned out to be the seventeenth grandson of Fan Zhongyan, a famous minister of the Northern Song Dynasty.

Just like Qin Hui's grandson Qin Ju bravely resisted Jin in Qizhou, and after the city was broken, the whole family went to the national disaster. Grandpa and grandson are not all the way, and it is not uncommon for the descendants of more than ten generations to be very different from their ancestors.

And Fan Wencheng was neither coerced nor surrendered, but after Jiannu captured Fushun, he and his brother Fan Wenyu took the initiative to take refuge, which can be called a complete hardcore traitor.

Although the old slave knew that Fan Wencheng was Fan Zhongyan's descendant, he once said to Zhu Beile: "This famous minister is also a good person." But this is also to buy people's hearts and show their love and generosity.

From taking the initiative to take refuge in the battle of Quang Ninh and going out with the old slave, Fan Wencheng was not only not reused, but was discriminated against and humiliated by the high-level of the Later Jin.

Guangning was defeated, Fan Wencheng faced the Jiancheng, and the backwardness of Houjin's weapons and equipment, and there was no good way.

But he began to study the art of siege, and although it was all old stuff in historical literature, he still got a lot of inspiration. After the failure of the first attack on Ningyuan, he offered advice, hoping to be reused and promoted.

Listening to the continuous return of the Tancai, the tactic of burning the stake array was initially successful, and the Ming army did not stop it strongly, Fan Wencheng quietly breathed a sigh of relief.

Nurhachi lowered his eyes, and the cold wind blew the red tassels on his helmet, as if to show that he was not in a calm mood.