Li Yi explained the theory of hot air balloons to Guo Ziyi as they ate.
Guo Ziyi nodded his head from time to time. He knew that the lanterns could fly. Only rich people could make lanterns on the 15th day of the first lunar month.
"Without a rope, the hot air balloon will fly upwards. When the wind reaches a certain height, it will blow towards this direction. When it reaches a higher height, it will blow towards that direction."
Li Yi gestured. He was unable to describe the specific height.
"The wind is strong, and there are ropes on top. The balloon can't fly out and will sway." Guo Ziyi followed Li Yi's words and pointed out the drawbacks.
"You still want to fly when the wind is strong? You should choose to run when the wind is down and prepare to attack when the wind is up. "Li Yi looked at Guo Ziyi helplessly.
Guo Ziyi smiled: "I wonder when you can make it?"
"The glass telescope has already been made. Come back to Zhuangzi with me tomorrow and give it to the Winged Knights. The hot air balloon … … will take three days. "
Li Yi considered Zhuangzi's ability as a craftsman and the hot air balloon's requirements and gave three days.
There was no fuel, but alcohol could be used. The torch was easy to make.
The hot air balloon's fabric was sturdy and brushed with tung oil.
Guo Ziyi asked about the feeling of flying in the sky. After eating for an hour, the two of them went back to sleep.
Li Yi settled a 'big matter' and relaxed. He lay down and fell asleep.
Guo Ziyi couldn't sleep. He thought about what happened today and how the hot air balloon could fly people into the sky.
Before today, if someone told him that people could fly in the sky, he would never believe it.
Seeing Li Yi flying around, he knew that Li Yi had something good.
"Make a bunch of hot air balloons and shoot people down with bows and arrows. That would be awesome."
Guo Ziyi's military talent was extraordinary. He quickly began to think about how to maximize the effect of the hot air balloon.
When defending a city, the enemy would attack like ants. There was only one line on the city wall that could hit the enemy.
The hot air balloon rose from the city and the height was increased. The enemy's siege towers were not so difficult to deal with.
The city wall was five feet high. The enemy attacking the city would take out a wooden frame that was six feet high.
There were wheels under the frame, which were pushed by people inside and behind. When they reached a certain distance from the city wall, they would shoot arrows at the people on the city wall.
Once they got close, the gangplank would be set up, and there would be ladders inside. Soldiers would continuously climb up from the siege trucks.
Such siege weapons were troublesome to manufacture, but their effects were remarkable.
Together with the long ladders with wheeled carts and the simple ladders with hooks in front, the pressure on the defenders was too great.
With the hot air balloons, they would be able to soar into the sky. No matter how high the siege towers were, how could they be taller than the ones flying in the sky?
If the wind was good, the hot air balloon could be stretched out, and oil could be poured on top of it to ignite it.
Guo Ziyi chuckled when he thought about how to use it to defend the city and how to attack the city.
He realized that it was the easiest to use a hot air balloon to attack other people's cities, as it was two to three hundred feet high.
The soldiers on the city walls were immediately suppressed when they were sent up to shoot arrows at them.
Ordinary crossbows would not be able to fly up to the top of the city wall.
"Find a place with water and train the Winged Knights on the small boat. The bumpiness of a horse is different from that of a hot air balloon."
Guo Ziyi said to himself. He was good at horseback archery. When he took the military exam, he could hit the target six out of ten times, and was awarded an A grade.
When he was horseback archery, the horse would run from one end to the other, hitting the bullseye of all ten targets.
Other people did not want to play anymore after seeing him perform once.
Guo Ziyi, whose mind was filled with hot air balloons, fell asleep at some point.
When the Xu family's child cried, the people in the Xu family mansion woke up and listened happily. Soon, the sound disappeared.
Old Man Xu ate an extra bun for breakfast, put down his chopsticks and went to see the child.
Xun 'er was not used to the change of environment. He wanted to find people he was familiar with and wanted to cry.
However, with his younger brother around, he quickly forgot about others.
He could walk a few steps and jog. He stood there and yelled to encourage his younger brother to run together.
Qian 'er was indeed anxious. He held the bamboo pole horizontally and tried to walk on his own time and time again.
After taking two steps, he lost his balance. Unlike the adults who fell, his legs bent and he sat upright on the ground.
A group of adults watched and encouraged him.
The older brother ran over to help his younger brother and then sat on the ground together.
The whole Xu family was suddenly filled with laughter. The steward sent people to buy meat. From today onwards, no one was a vegetarian.
There were people from the Xu family who were pushing down the wall next to the Drunken Immortal House.
They let Guan Xiaotan see where to dig a canal to draw water. When the canal was dug and the water was drawn over, they would consider how to fix it.
At about ten o 'clock in the morning, Li Yi appeared.
He invited the old woman to Zhuangzi for further examination to see if she needed medical treatment or surgery.
He did not go to see the child, afraid that the child would ask to go back with him.
At noon, the team returned to Zhuangzi and began to arrange where to put the monitoring head.
This thing was magical and could be used day and night.
The farmers discussed putting a place where they felt it was dangerous and did not hang lanterns at night.
Some people felt that the place was dark and passed by it. It was just right to clean it up.
Li Yi was not in a hurry to eat. He took the old woman for examination first.
"In your situation, I suggest you take local injection to relieve the pain, and then use acupuncture and local heating to maintain it …"
Li Yi introduced the situation to the old woman and asked if she agreed.
The old woman had no choice. Of course she agreed.
So Li Yi mixed the medicine for the old woman and injected it. It was painful at the time of injection, but soon it was no longer painful. There was anesthetic in it.
Less than an hour after the injection, the old woman moved her legs and showed a happy expression. "Miracle doctor, it doesn't hurt so much."
"Don't do strenuous exercise now. Continue to rest. Keep your knees warm. Don't live too close to the water.
I've seen Zhuangzi. It's really beautiful and there are many ponds. But the water vapor is also heavy, which has a direct impact on your condition.
Go back and see the situation. If you don't feel well for two days, you can hold on. If you feel red and swollen on the third day, come immediately.
If there are no other problems, go back to Zhuangzi for a check-up after ten days. If necessary, follow up with a needle.
This needle can only treat the symptoms but not the root cause. You still need to rely on acupuncture and massage for long-term relief treatment … "
Li Yi continued to give medical advice. The Xu family members who came with the old woman listened carefully and took note.
On cloudy days and rainy days, they could apply plasters when the air was heavy. On normal days, they could bask in the sun. In winter, they had to wrap themselves in a circle of fur and build a brick bed.
Turning around, Li Yi was waiting for the old woman to adapt. At the same time, he observed the situation after the medicine and talked about the future of the Xu family.
Since the Xu family provided the water, they naturally enjoyed some benefits.
For example, they could open a gate to the Drunken Immortal Residence. If the spring water was large enough, they could even put it on a boat.
What he said made the Xu family members happy, and they continued to talk.
Li Yi smiled. "Okay, time's up. Take a few steps and see. But don't walk too much. You still need to rest."
He had been wasting time talking about interesting things to divert everyone's attention.
"Miracle doctor, you have a good heart." The old woman immediately understood. She praised him as she stood up and walked a few steps.
"Much better, just a little uncomfortable. It's better than before when I couldn't stand the pain." The old woman smiled.
At this time, it was already past 1pm. Everyone went to eat.
After eating, the Xu family members escorted the old woman back.
Li Yi took a lot of small toys that the children played on Zhuangzi and gave them to take back.
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