"I'm afraid you won't be able to adapt to the environment." Lin Xiyan looked at her with concern and said.

"We have been here for more than a month and there is no discomfort." Hua Banzhi patted her chest and said, "There is a kind of discomfort that makes you feel."

"Haha..." Lin Xiyan shook his head and laughed when he heard this, "If I don't cook, you will not drink it." He looked at him and accused.

"We are in good health, and it's okay not to drink it. Why do we have to force the medicine to drink!" Hua Banzhi curled her lips in disgust.

"That's right, that's right." Zhou Guangming ran out of the house and said.

"I'm so sweet." Lin Xiyan said to them.

"There are medicinal materials inside, but not sugar water." Zhou Guangming said with a pout. At first, he really thought it was like sugar water, and pouring it in one mouthful made him choke.

"When I come back, I will add some medicinal materials to ensure that they have no flavor and don't need to cook herbal tea." Hua Banzhi looked at him and then tsk... "Drinking hot soup on such a hot day is really like taking a bath."

"You were sweating unconsciously and were taking a shower, which was very exciting." Lin Xiyan looked at their unkind smile and said.

"It's only June, and I haven't even entered the slums yet! I really don't know how to survive the next three or four months! How do you spend the summer?" Hua Banzhi looked at him and asked for advice sincerely.

"This is what I'm living! When it's the hottest, I want to jump into the river and not come out. What's the matter if I don't realize it? Summer should be hot! Can it be called summer if it's not hot?" Lin Xiyan said with a smile as he looked at them.

"It means I didn't say anything." Hua Banzhi stood up and said, "It's time for me to go to class." He looked at Zhou Guangming and said, "Guangming, you're at home! It's hot outside."

"Then I won't go to see you off." Zhou Guangming looked at her and said embarrassedly, "I won't increase my burden on my uncle anymore. I'm so tired when riding a bicycle to carry me and my mother."

"This kid is sweet-mouthed." Lin Xiyan looked at him and said, "Look at the door, don't go out and run around."

"Yeah!" Zhou Guangming nodded quickly and said, "It's so hot outside that I won't go out!"

Lin Xiyan stood up and said, "Zhizhi let's go!"

Lin Xiyan rode a bike to send Hua Banzhi to the school. On the way back, he bought some bamboo poles as thick as fingers and came back to set up the shelves.

"What are you buying a bamboo pole?" He Hongjun shook his palm-leaf fan in his hand and looked at Lin Xiyan who was coming towards him.

Lin Xiyan got out of the car and looked at him and said, "Put the rack for the vegetables."

"My brother and sister really don't change the true nature of the working people." He Hongjun turned around and looked at the flowers and trees in his yard, "I don't have time, I have time, and I also have the whole vegetable garden."

"Let's go! Come to your house, your house will be cooler." He Hongjun looked at him and said.

The two returned to Lin Xiyan's home. Lin Xiyan unloaded the bamboo pole from the car and placed it under the corridor, and the car was supported under the corridor.

Lin Xiyan watched He Hongjun change into slippers and pulled into the living room.

"What is Guangming writing?" He Hongjun walked in and saw Zhou Guangming lying on the Eight Immortals table.

Zhou Guangming stood up and looked at the man and said, "Uncle He. I'm writing big words!" Looking at Lin Xiyan behind him, he said, "Uncle, you are sending your mother back."

"Yeah!" Lin Xiyan looked at him and said, sitting at the Eight Immortals table, shaking hard with a palm fan.

"Xiyan, I envy your house, which is much cooler than the houses on my side." He Hongjun sat down, shook his palm-leaf fan and said, "I didn't expect that the summer in Lingnan is so hot."

"It's hot all over the country in summer." Lin Xiyan said to him.

"It's tide and hot here, and it's raining, and it's wet every day." He Hongjun said disgustedly, "Look at the sky outside, it's cloudy again, and it's not cooler when it rains."

"You are here to complain about the weather." Lin Xiyan picked up the teapot on the table, turned over the upside down teacup, and poured two glasses of water.

"Give it water." Lin Xiyan pushed the glass into his eyes.

"Uncle, Uncle He, I'm in, you guys chat." Zhou Guangming stood up and left with his writing book and pencil.

"Go!" Lin Xiyan said gently at him.

He Hongjun watched Zhou Guangming leave, looked back at Lin Xiyan and said, "Oh! This child is really winking and a little jealous."

"I'm jealous of someone else's child." Lin Xiyan snorted.

"You're so pretty! There's another word between this uncle and his father." He Hongjun said dissatisfiedly.

"Are you here to anger me?" Lin Xiyan said to him.

"I'm here to become a disciple." He Hongjun looked at him and said, "You agreed at the beginning that I will teach me the knowledge of planes and flights when I come back."

"Then let's start!" Lin Xiyan picked up the water cup and took a sip and said, "Did you bring paper and pen?"

"Take it." He Hongjun pulled out the pen from his chest pocket and took out the notebook from his trouser pocket, "Okay, let's start!"

"Before the lecture, can you tell me why the plane can fly?" Lin Xiyan asked looking at him.

"Isn't this simple? It's just an engine or an engine!" He Hongjun said casually.

"According to your theory, you can fly if you run fast. The car also has an engine. Why doesn't it go to the sky?" Lin Xiyan looked at him and said.

"This...that..." He Hongjun hesitated and grunted for a long time, simply said, "How can I know this? I haven't learned it before. It's like a pistol, I can just drive it. I'm the ten-ring of the target target. I have to say the principle of the gun."

Lin Xiyan was really convinced, "You are really unreasonable." Looking at him, he said seriously, "Brother, you are the head of the airport. You can forgive others if you don't know, you must not know!"

"Okay! Okay! I just don't know how to ask you? I'll know if you tell me." He Hongjun said with a smile.

Lin Xiyan looked at him and said, "To put it simply, when the plane takes off, it depends on the thrust and pulling force generated by the engine, which makes the plane generate a huge forward speed when it is slid, and then the wings will generate a certain lift, so it will fly."

"Wait a minute, wait a moment, you say slower, I can't keep up." He Hongjun said, and the pen in his hand made a rustling sound on the notebook.

Lin Xiyan waited patiently for a while, watched him finish writing with a fan, and said slowly, "There is another reason why the aircraft can fly. Another reason is that the wings of the aircraft are specially designed. When the air flows through the surface of the wing, pressure will be generated above and below it. However, the pressure above is relatively small, and the pressure below is a little larger, which is enough to support the airplane. There is an air flow in the atmosphere, and the wings generate a kind of vitality based on this relative airflow. In addition, the engine of the aircraft uses oxygen in the air as an oxidant, so the fuel can burn and produce pushing force, so the aircraft can fly."
Chapter completed!