The sun sets and night falls. All the noise is suddenly drowned out by the darkness, and the tribe, inside and outside, becomes quiet.

This is one of the great benefits of the primitive era.

Without the ubiquitous lighting facilities that illuminate the night as bright as day, people of this era were destined to be unable to work day and night as they did in later generations.

As long as you lie on the kang and sleep peacefully without singing too many primitive tunes, you can still get enough sleep.

However, Han Cheng is not among these people.

He kept his eyes open in the darkness, constantly thinking about how to deal with the problem of the Kongming lantern.

Stone, pottery, bones, leather, trees... He considered these things one by one many times, but found helplessly that none of them could replace metal wire.

This discovery made his mind a mess and his mood became a little irritable.

After an unknown amount of time had passed since this situation began, Han Cheng became even more impatient.

Because he had decided to ignore all these for the time being and had a good sleep, he found that his mind was still in a mess and he couldn't fall asleep.

Insomnia has always been an extremely uncomfortable thing.

After tossing and turning in bed for a while, Han Cheng still couldn't fall asleep and felt uncomfortable all over, so he decided to give up resisting.

If you want to fall asleep peacefully at this time, it is obviously impossible to rely on yourself alone. You must take a sleeping pill.

Otherwise, this night and tomorrow will be ruined.

After making this decision, Han Cheng groped his way off the kang.

With the faint red light coming from the fire pit in the pit, Han Cheng picked up a grass stem that was easily ignited, opened the almost sealed mouth of the kang a little, and inserted the long grass stem in, pressing it against the dark fire.

After waiting for a while, flames appeared as smoke rose.

Han Cheng pulled out the burning grass stems and lit the oil lamp on the earthen platform.

The room suddenly became much brighter.

Han Cheng put out the burning grass stems, and quickly sealed the fire hole of the kang, leaving only a small gap.

In just a short while, the fire in the kang became much bigger.

This won't work. Before long, the kang will be too hot to sleep on.

After doing all this, Han Cheng, who was feeling a little cold, quickly got on the kang and got into the warm quilt.

The previous preparations have been completed, and now he is going to start taking sleeping pills.

After warming his hands, he reached out and touched Snow White who was sleeping next to him, rocking her gently.

Sister Bai Xue murmured a few times in her sleep, then opened her sleepy eyes.

Han Cheng smiled and moved closer to Bai Xue.

Sister Bai Xue, who was already familiar with these things, didn't say a word. She propped herself up with her arms, then bent down again and began to feed Han Cheng sleeping pills.

It is not dragging its feet at all, and has the refreshing style of primitive people.

This kind of sleeping pill is undoubtedly very comfortable to take. This can be seen by just looking at Han Cheng who is looking at Bai Xue with a sly smile on his face.

It took a little long to feed the sleeping pills.

It wasn't until Sister Bai Xue's cheeks became numb and stiff that it was considered over.

It was said that Han Cheng took sleeping pills, but in the end it was Bai Xuemei who ate something.

Despite this, the effect is surprisingly good.

As soon as the medicine feeding process was over, Han Cheng felt sleepy.

Reaching out and gently pinching Bai Xue's face, Han Cheng stood up and blew out the lamp despite his fatigue.

The wick made of hemp rope was leaning against the edge of the oil lamp bowl, burning quietly. The orange-yellow flame was shaking slightly in the wind brought by Han Cheng.

Han Cheng, who was about to blow it out, took a deep breath and held it in his chest, and did not blow it out immediately.

He stared at the burning wick, looking a little dazed.

After this state lasted for a while, an uncontrollable joy surged in my heart.

"call!"

This stillness lasted for about thirty or forty seconds before Han Cheng exhaled the foul air.

The flame jumped, and then went out without any additional resistance.

Han Cheng groped his way back to the kang, got into bed, reached out and held one of Bai Xuemei's hands, and hugged Bai Xuemei to him. He became even more excited.

However, this excitement was different from the previous kind of irritability that made one have no clue what to do. Instead, it brought with it a sense of relief and ease of having found a solution.

In addition, Bai Xuemei gave Han Cheng a dose of sleeping pills, so after lying here and thinking about something for a while, Han Cheng also fell asleep...

The next morning, Han Cheng got busy and began to verify the solution that he had thought of last night.

First, I found a few small bowls from the pile of ceramic bowls that were thinner and lighter than the rest.

Then he started to use something to drill holes on the edge of the bowl, four in total, two opposite each other, forming a cross shape.

Then he found four very thin leather ropes and passed them through the four holes.

After doing all this, tie the other ends of the four leather ropes to the frame of the Kongming lantern.

The four ropes are of the same length, so that the ceramic bowl can be kept in the center under the Kongming lantern.

Shitou, Bo and others are very concerned about the matter of Kongming lanterns.

So yesterday, after they collected the pine resin, under Han Cheng's guidance, they melted it in a small bowl, used a piece of bamboo to smear it on the frame of the Kongming lantern, and then covered it with the washed snake skin.

Today, it has been completely completed and the snake skin has become extremely strong.

Han Cheng put a ball of linen soaked in rosin into the ceramic bowl with holes drilled in it.

Shitou, whose hands were shaking with excitement, held a Kongming lantern that was a size larger than the ones commonly seen in later generations, and straightened several leather ropes.

Han Cheng put a burning stick into the pottery bowl.

The linen soaked in rosin was extremely flammable, and soon after contact, a ball of smoky flames ignited.

Because the opening at the bottom of the Kongming lantern is much larger than the bowl, and the bowl is relatively close to the Kongming lantern, after the leather rope is straightened, the four ropes tied to the edge of the bowl form an obtuse angle of more than 140 degrees between the bowl and the Kongming lantern.

In this way, except for the connection of the edge of the bowl, the rest of the place is getting farther and farther away from the bowl, avoiding the top of the bowl and is not easily burned by the flame.

Hotter, colder, and lower. As a person who always gets high scores in liberal arts exams, he remembers this very clearly.

As the flame continued to burn, the air flow under the Kongming lantern began to move upward due to the heat and poured into the sealed Kongming lantern.

"let go."

After waiting for a while, Han Cheng spoke.

Shitou was worried that if he let go, the lamp that he had spent half a day working on yesterday would fall down and be burned by the fire.

But since the Son of God had said so, he hesitated for a moment and then let go of her hand...

(I just opened the backstage and saw a reward of 10,000. My drowsy mind instantly cleared up. I would like to thank my book friend le凉人 for his generous reward and all the book friends for their support. Thank you everyone! However, I can’t add more chapters for the time being. I will start my thesis defense in early May. Up to now, I have basically not written much. I am very panicked... I can only wait until this dark period is over before I can write again.) Fupin Chinese