Although Yu Wan was just a small doctor in the Ministry of War, he was a fifth-rank official in the capital and made extraordinary achievements. Therefore, Chongzhen gave him an additional mansion, located next to Ziyang Lake, ten miles west of the imperial city.

Although the mansion is not big, there are only six houses, a courtyard, a hall and a maid, this is Yu Wan's first home after traveling through time. He has been wandering for a while and his life and death are unpredictable. This time, he finally has a fixed habitat.

Yu Wan thought that so many rooms were empty, so she let Xu Hu, Yu Hao and the maid Xiu'er live in. First, they had a place to settle down, and second, they had a companion with him.

Everyone packed up for a day and finally tidied up the Yu Mansion as if it were home. Looking at this clean and tidy new home, Yu Wan nodded with satisfaction and personally cooked a delicious meal to reward everyone.

These four men and women are of similar age, and Yu Wan is not a person who likes to distinguish between superiors and inferiors. After a meal, the little maid Xiu'er became familiar with the three of them.

Through a simple conversation, Yu Wan learned that Xiu'er was exactly eighteen years old this year. She was the daughter of a local farmer. Because of her life, her parents could not afford so many heavy taxes, so they sold her to Zuo Mansion as a maid at the price of three dans of rice. Seeing that she was beautiful and smart, Zuo Liangyu offered her to Master Chongzhen, and later was sent to Yu Wan Mansion.

After listening to her story, Yu Wan not only sighed secretly, but also a miserable child. Compared with the family background of the body's owner, he made up his mind to treat her as his sister.

Just as everyone was having a good meal, Yu You walked in with a few palace maids.

"Brother Yu, the princess you want is all you want."

Yu You took great care of Chongzhen along the way, so after Zhu You ascended the throne, he appointed him as the seventh-rank Zhaoxun and accompanied Ling Xiang.

"It happened to be here, let's have a meal together!"

Yu Hao felt very intimate about the little girl from the same village, so he quickly pulled her into the house and sat down.

"Brother Yu, this letter was sent to you by the princess."

As he said that, Yu You took out a letter from his arms and handed it to Yu Wan.

Yu Wan opened the letter and saw it read, "I will never miss you in my life, but I will miss you. I will miss you for three days. But I feel like three years after I am separated from you. Now that my father ascended the throne, my family will also live in the palace and cannot accompany you every day. I heard that Yu is going to Henan, and this is going to be very dangerous. I hope you are cautious and I look forward to your return."

The handwriting on the signature is a bit blurry, as if it was soaked in water. I think this girl should have written while crying. It seems that the news of her going to the enemy's nest alone scared her.

How should I reply? Yu Wan took out the paper and pen, pondered for a long time but still couldn't organize his words, so he grabbed the brush and waved his hand: It's okay, don't worry.

"Yu You, please hand over the reply to Ling Xiang."

As he said that, he folded the letter paper and handed it over.

"Brother Yu, the princess heard that you were going to Henan. She cried several times in Xiyue Palace. You must pay attention to safety and come back safely!"

Yu You collected the letters, put down the bowls and chopsticks, and said to Yu Wan and Xu Hu worriedly.

Yu Wan smiled faintly. "Relieve the princess, Yu Langzi is very lucky, right? Hu Zi."

"That's not." Xu Hu patted his chest indifferently, "With me taking care of Brother Yu, the princess, please feel relieved!"

"Brother Yu, brother, I am not a person who is afraid of death. How about letting me accompany you?"

Yu Hao knew that his fist skills were the worst among the few people, so he always felt inferior. This time, Yu Wan only took Xu Hu to act, so he felt even more frustrated and uncomfortable.

How could his mind escape Yu Wan's eyes? "Haozi is relieved. This is a lot of danger. One more person will be more likely to be exposed. What's more, if we all leave, then who will protect the princess, who will protect Yu You, and who will protect Yu'er."

After hearing what Yu Wan said, Yu Hao felt better. After a while, he flipped through the things brought by the palace maid and asked in confusion, "Brother Yu, why did you ask the princess to find so much wool, silk and kraft paper?"

"Don't underestimate them. You can rely on these things when you run away in the future."

Looking at the pile of materials, Yu Wan couldn't help but be overjoyed. He wanted to make a secret weapon, a secret weapon for escape!

Yu Wan's work has always been mysterious and unexpected, and everyone did not go into the meaning of his words. At this moment when young men and women were chatting, time soon came late at night.

After everyone left and slept, Yu Wan secretly brought the materials to a side room on the east side. After confirming that there was no one around, Yu Wan carefully lit candles and tinkered with the memories of his previous life.

He first used iron wire to form a pocket-shaped rack, then wrapped a layer of kraft paper on the iron rack, then wrapped a layer of silk on the outside and wrapped it into a ball.

After everything was done, Yu Wan connected the balloon with the iron plate with a rattan, and then tied a hanging basket under the iron plate.

After doing all this, Yu Wan took a breath, wiped the hot sweat from her face, took this simple balloon into the yard, lit the extremely dry wool and straw and put it all into the iron plate.

After burning for nearly a quarter of an hour, the hot air swelled up the paper ball and began to rise slowly, straightening the rattan.

Seeing this, Yu Wan was overjoyed and quickly grabbed it and slowly set it up. After a while, when the fireworks filled the ball with great expansion, the balloon rose into the air with Yu Wan's support force and supported it up along the breeze!

As the hot air balloon flew into the air, it also marked the successful completion of Yu Wan's flight plan!

Yu Wan's escape weapon was a hot air balloon that was released in the 18th century!

The fourth son of the emperor Zhu Cizhao is so important. He is the only son of Emperor Chongzhen who has a whereabouts. He is the person who is most likely to succeed the throne of Emperor Chongzhen. As long as he is caught, he can blackmail the Chongzhen regime in exchange for great benefits!

Of course, Li Zicheng, who was scheming and conceited, knew very well about this, so Dashun would inevitably mobilize heavy troops to find the fourth son of the emperor.

Yu Wan knew very well that it was almost impossible to bring Zhu Cizhao back safely with him while surrounded by powerful enemies, unless he could escape.

And Yu Wan planned to escape! So the moment he led the army in the court, he thought of making a hot air balloon in case of emergency.

Later generations used nylon fiber and plastic to make hot air balloons, but now Yu Wan does not have these hardware equipment. After thinking hard, she thought about using kraft paper and silk instead of nylon, so that Ling Xiang could prepare these scarce materials from the palace. Unexpectedly, it really worked!

How could this not make him ecstatic!

After the test was successful, Yu Wan could no longer control himself and used all the materials. Not only did he increase the thickness of the paper and silk, but he also used iron buckles and ropes to tightly clamp the gaps between the gaps, and then paste a thick layer of wood lotus leaves on the inner layer of kraft paper.

The reason why a layer of wood lotus leaves is added to the innermost is that the wood lotus leaves have extremely high moisture content and can burn under the barbecue of fire without burning. It can have a good fireproof effect and prevent the hot air balloon from being burned before it takes long to fly, greatly improving the practicality and safety of silk paper balloons.

After two or three hours of busy work, this simple but practical hot air balloon finally took shape: three or four meters in height and more than two meters in diameter, making it easy to fold and carry. After arriving in Henan, you can assemble and take off by finding a fire-filled vessel and a manned hanging basket.

As long as you maintain enough heat and wind, it should be no big problem to take off with two or three people!

After making this secret weapon, Yu Wancai fell asleep with relief...

I'm still working hard to write on the weekend... Can I collect and recommend more
Chapter completed!