Chapter 1937

He knew that these guys usually fooled around and now deliberately said things were more serious, just to avoid these guys talking nonsense and let these guys know the importance of some things.

The eldest sun rushed to his head and could understand Zhang Feng's meaning in an instant. After thinking about it in his heart, he said, "I trembled violently when I rose just now. I don't know if these count? Later, there was nothing."

After that, he glanced at Chumo and Du Gou. Seeing that they had nothing to add, he nodded: "that's all."

Zhang Feng frowned and wondered.

How does it shake?

Isn't it usually good?

What's wrong now?

He walked around the hot-air balloon several times, and then reached out to check the parts one by one.

When the iron wire was checked, it was found that the iron wire was not firmly tied.

I thought to myself, these guys are really lucky. It's all right.

However, this also reflects Ma Zhou and others' carelessness.

It seems that you should be careful next time, or you will really die.

Thinking, he glanced at the crowd, and finally stopped his eyes on Ma Zhou and others: "this is your mistake. You must not do this next time. You must check all the equipment properly, otherwise you may die."

Ma Zhou saw it and nodded quickly, "yes, mentor."

Zhang Feng nodded and then said, "go and prepare some candles and some thin copper wires immediately. Remember, it must be much thinner than the iron wire this time. Come to me when you are ready."

Ma Zhou was puzzled.

What does your teacher want candles for?

It doesn't work.

But when I thought that my mentor had orders and might have other intentions, I nodded and turned away.

Chumo and these guys are idle people. Seeing that they have nothing to do, they find a place to raise a fire and sit around for warmth.

Seeing the excitement, Zhang Feng gathered together and arched his hands with incomparable warmth.

After a while, Ma Zhou came back with his things.

"Teacher, I've got my things back. What should I do now?"

Hao Chujun put things on the ground and asked seriously.

Zhang Feng glanced and finally fixed his eyes on the candle: "light the candle first, and then drop the wax water on the seal later."

Drip on the seal?

Hao Chujun was stunned and looked at Ma Zhou.

It seems a little clear that in the past, wax was used to seal envelopes in the army.

The wax water is airtight and airtight. Once it drops on the envelope, you can see at a glance if you have moved any hands or feet halfway.

Until now, sealed envelopes in the army still use this method.

Does the teacher want to isolate the air flow with wax water?

After thinking for a while, he still asked, "mentor, are you going to isolate the air flow with wax water?"

"Good."

Without hesitation, Zhang Feng said directly, "since you see it, I'll tell you that wax water has good characteristics of isolating air flow and water flow. In the experiment, there are very important places. However, I'm afraid of high temperature and will melt in case of high temperature. This is also the reason why I use wax water this time."

They nodded. They could basically understand everything the teacher said.

Zhang Feng smiled and glanced at the hot-air balloon: "since we all understand, let's start the experiment. He said that there is still air in the hot-air balloon and drop wax water on it."

The two nodded. They lit the candle with a fire fold and dropped it on the seal. At first, due to the characteristics of silk, the hot-air balloon contracted slightly, but they soon adapted. After a while, the whole seal was full of wax water.

Ma Zhou looked at Zhang Feng and said seriously, "mentor, the wax water has been dripping. There should be no problem."

Zhang Feng nodded and didn't reply. Instead, he looked at Chumo and others who were baking: "iron ox, big cake, insects, get up and work."

Chumo and others turn around and glance at each other. Their faces are a little ugly.

To tell you the truth, they don't want to go to heaven.

At first, when this thing came out, everyone thought it was novel. Everyone wanted to try it. It's understandable.

But after the last wrestling, they have left some shadows in their hearts, and there are no days that can't be erased.

Today, I let them go up again. There was a shadow in my heart. Besides, the cold wind blew on it and it was as cold as a dog.

How can you stand it?

So Chumo spoke. He looked at Zhang Feng with a pleading face: "Fengzi, didn't we just go up? Can't you change a pit? For example, your two precious disciples?"

"Yes, Fengzi."

Chang sun Chong was also a little unhappy. He almost froze to death in the sky just now. He finally came down to the fire and now he has to go to heaven. How can this be done? His brow was horizontal: "it's so cold in the sky. We finally got down to warm up. Don't you know how to be considerate of us? Why don't you change those two guys?"

Then he pointed to Ma Zhou and Hao Chujun.

Du Gou also looked at the wind and pointed to the two people, as if he wanted them to go to heaven.