Early in the morning on the third day of the Lunar New Year, Zhao Hao went to the kitchen in the backyard and saw that the honeycomb coal had been dried.

After breakfast, the young lord also arrived, and of course the little county lady who followed him like a shadow was also present.

"Oh, the county lady is here too." Zhao Hao was standing in the yard, directing his disciples to make preparations for the experiment.

"Good day, big brother." Li Mingyue bowed to Zhao Haofu and said softly, "Mother was worried that my brother would pretend to obey her but actually disobey her, so she asked me to accompany him to prevent him from going somewhere else."

Li Chengen was stunned when he heard this. He thought, is that so? Isn't that right? It was me who was about to leave when you insisted on following me, right?

"Thank you for your hard work, sister." Zhao Hao couldn't help but sigh in his heart. He wondered what sins the county lady had done in her previous life to have such a troublesome brother.

"It doesn't matter. As long as my brother can learn well, it doesn't matter if my sister has to work harder." Li Mingyue said, smiling and glancing at Li Chengen to prevent him from saying anything inappropriate again.

Li Chengen moved his lips a few times, and finally the truth of the matter became a secret that had to rot in his stomach.

But I heard a burst of joyful laughter coming from above my head.

He looked up and saw the governor's son, who was guarding the door and sweeping the floor, sitting on the roof, pointing at him and laughing.

~~

Today is the last day of Zhao Shixi's New Year holiday. Tomorrow, he will engage in pleasant and intense training.

However, the entertainment venues in the capital did not open until the sixth day at the earliest...so not only did Zhao Shixi not spend his ticket, but one ticket turned into two.

This made Xiwa very depressed in recent days. She has been lying on the roof in the sun, not wanting to pay attention to anyone.

It was not until he heard the conversation between the three people below that he realized that Li Chengen had also been thrown to Zhao Hao's care by his mother.

Zhao Shixi suddenly felt that in this world, good and evil are rewarded.

So he pointed at Li Chengen on the roof and laughed out loud.

"I didn't expect you would have such a day, did you? Do you still have the nerve to laugh at me?"

When the young master saw that it was him, he couldn't help but sneer and said, "Then I am your uncle too."

"You uncle!"

"You uncle!"

The two of them started to fight, one above and one below, like fighting cocks.

Zhao Hao's disciples shook their heads and thought that their master was too hard-working. In addition to teaching geniuses like us, he also had to discipline mentally retarded children.

"Brother, please don't argue with others..." Li Mingyue couldn't bear it any longer, and timidly pulled the young master's hand, and at the same time, using the cover of her sleeve, pinched him hard.

Then, while everyone was looking at the roof, she threatened in a low voice that only the two of them could hear: "If you embarrass me again, you'll be dead!"

Li Chengen's expression was distorted by the pain. But seeing the kind look in the girl's eyes, he could only force a smile and said, "Forget it, I won't argue with a gatekeeper."

"You are just an apprentice." Zhao Shixi was as proud as a victorious rooster.

"Have you said enough?" Zhao Hao turned around and glanced at Zhao Shixi.

The fighting cock immediately became cross-eyed, and Zhao Shixi's legs went limp, and he almost fell off the roof...

~~

By the time Zhao Hao and Li Mingyue had dealt with the problem children, the apprentices were ready for the experiment.

In the spirit of scientific experiments, Zhao Hao asked them to prepare three rooms and three charcoal basins.

The disciples first gathered the charcoal basins in the first room.

Then he explained to the county lord and his sister, "These three basins are filled with ordinary loose coal, coal lotus roots made from ordinary loose coal, and high-quality anthracite."

"Hmm." At this moment, not only Li Mingyue, but also Li Chengen showed a curious expression, wanting to see what Zhao Hao was going to do.

Young people are naturally curious, so how could they not be interested in new and unprecedented scientific experiments?

"Come on, let's light them one by one." Zhao Hao snapped his fingers.

The eldest and second brothers went to light the two pots of loose coal respectively.

They both helped Qiaoqiao to light a fire in Caijia Lane. If their junior brothers were to do the same, they might not be able to light the fire.

However, even the two experienced brothers had to light the charcoal first before they could ignite the coal in the basin.

Zhao Shizhen only used the tinder from the lamp to light a piece of coal lotus root.

"So easy?" The young master was surprised. In his impression, coal was very difficult to light. You have to use charcoal to start the fire like Eryang did.

Although he is a young man who is not good at worldly affairs, he still has some common sense.

"Because there is sawdust mixed in this coal lotus root." Zhao Hao smiled faintly and said, "The other two ordinary coal lotus roots are not so good. But if this one catches fire, all of them will burn as well."

"Great." Li Chengen couldn't help but praise.

"That's right, eldest brother has the greatest ability..." Li Mingyue held her cheek while saying this, not knowing whether it was because of the cold or what.

After the other two pots were lit, Zhao Hao ordered Eryang to carry them into the other two rooms.

Then everyone followed Wang Wuyang into the room that burned ordinary coal.

After a while, they were all choked out by the billowing smoke.

"Cough, cough, cough..." Amid the continuous coughing sounds, the young men and women from wealthy families finally realized why the people of the capital city had such an inexhaustible energy source, but only burned coal for cooking and heating when they had no other choice.

The coal smoke was terrible. As soon as the coal stove was lit, the house was filled with thick smoke, making it impossible to stay there.

Zhao Hao led people into the room where anthracite was burned. It was indeed much better here, at least there was no smoke or dust.

"This white coal is really good. I heard that many families use it to replace firewood." Wang Dingjue said down-to-earth: "But it is still a bit choking, so rich people still burn charcoal."

"Yeah." Everyone nodded in agreement. This so-called 'anthracite', although no smoke can be seen when it burns, it will still choke people if they stay near it for too long.

Moreover, Li Mingyue discovered that a thin layer of ash had fallen on her brand new white velvet cape...

She didn't even enter the first room just now, so it was possible that she fell here.

Finally, they entered the house where honeycomb coal was burning.

Everyone was surprised to find that this coal lotus root made of ordinary coal, after burning for such a long time, actually had no smoke and was not choking...

"How come there's no cigarette?"

"Why is there no cigarette?!"

“And it doesn’t choke you!”

Seeing everyone's stunned expressions, Zhao Hao thought that honeycomb coal with this formula would still be widely used in rural areas four hundred years later. Wouldn't it be easy and enjoyable to shock you?

"There's not even a speck of coal dust yet..." The young county lady touched the tabletop and exclaimed in surprise when she saw her fingers were as smooth as before.

"You observe very carefully." Zhao Hao nodded approvingly.

Li Mingyue immediately felt as if she had eaten honey, and her whole heart and face were sweet.

Everyone looked at Zhao Hao and asked him what was going on.

"I'm telling you directly, I'm afraid you won't be impressed." Mr. Zhao put his hands behind his back and said to the students with a smile: "Why don't you try to use scientific methods and study it yourself?"

"What is the scientific method?" The young master felt that he knew very little...

"It is a method of conducting research under the guidance of the scientific spirit." Wu Yang and Zhao Shizhen gathered around the fire and observed it carefully.

ps. Chapter 4, 6900 votes and more updates, please give me monthly votes and recommendation votes~~~