The girl traveled through another world and forced the prince to take the imperial examination

The village chief and Li Zheng took the Mu family's carriage to the county government office. They held Feng Zhishang's jade token in their hands as if it were a treasure, as if it were a golden medal of immunity from death.

Feng Zhishang only gave the village chief a jade token and did not give the prescription for curing the epidemic.

Mu Qingcheng didn't ask, but after a moment of confusion, she understood his thoughts. This old man was indeed cunning and sly.

The epidemic has only been brought under control, not yet cured. Coming up with a cure too soon, claiming it's a simple cure, would only make the world think they're making a fuss. Worse still, it would lead to malicious speculation that they're trying to profit by creating panic.

Human nature is not kind. In this world, even the most ambitious people will be criticized. It is better to wait and see what happens, and then show your skills in times of crisis. This is the way to save the world.

Mu Qingcheng sent the village chief away, and immediately asked Cui Fengzhishang to go back and give Yun Qing a medicinal bath. She stayed here to look after the patient.

Why did Feng Zhishang feel like a tool, used wherever he could be useful? Was there no one who cared about him? He was so old, and he hadn't slept all night last night, changing the prescription and boiling the medicine. No one felt sorry for him!

Mu Qingcheng took Zijin to the courtyard. Before they approached the courtyard, they smelled the fragrance of herbs in the air.

Two large pots were set up in the yard, one boiling medicinal herbs, the other boiling water. In the middle, a rack was erected to dry the herbs.

The courtyard was small to begin with, and the three northern rooms were filled with people, while the eastern wing was also filled with beds. Even the central hall was filled with beds. All the furniture had been moved away, leaving the empty room filled with beds.

The majority of women and children live in the north room, while the men live in the east wing.

The village chief sent six people today, and I heard they were taking turns visiting each house. These three men and three women were very diligent, and the courtyard was clean inside and out. The men took care of the patients in the east wing, and the women took care of the patients in the north wing.

Mu Qingcheng was very satisfied. She wore a white isolation suit and a mask, wrapping herself tightly. She walked around each room like a leader inspecting the work.

In fact, she didn't know any medical skills, so it would be useless for her to see him. But the patients didn't think so. Seeing Mu Qingcheng was like seeing a savior. In their hearts, Mu Qingcheng was a fairy who could save them. When she came, the patients' spirits improved a lot.

Mu Qingcheng looked around and saw two braziers in the room, but she still felt very cold. She asked the six people what was going on.

"This is an order from Divine Doctor Feng. Divine Doctor Feng said the room is small and there are many patients, so the windows must be opened for ventilation every hour."

So that's how it is. Mu Qingcheng didn't have a good solution. In later hospitals, disinfectant was used, and she didn't have the formula for it! How about purifying the alcohol?

Alcohol! That's easy to make.

Mofeng came back in the afternoon and brought back two iron stoves.

Several people gathered around the stove, looking at it and touching it. Mu Qingcheng was also very curious. Isn't it said that the craftsmanship in ancient times was backward? But this purely handmade stove is not behind the craftsmanship of later generations at all, and it is even quite beautiful!

Mu Qingcheng designed two stoves. The outer shell of one stove was a water tank, which became the heater of later generations when filled with water.

The other type is the simple coal stove that every household in the north had in the 1970s and 1980s.

The iron water tank stove was placed under the window of the hall, with the long chimney extending out of the window. The water tank was filled with water and the furnace was filled with coal.

Soon, white smoke rose from the chimney, the water in the tank became hot, and the temperature in the room also rose.

Mo Xue asked curiously, "This coal is better than silver charcoal. It doesn't have any smoke smell at all."

Mo Yun touched the water tanks on both sides of the stove: "Come on, come on, the water here is hot but not hot at all."

Feng Zhishang also walked around the stove in wonder: "This black stone can also burn fire? This old man is really an eye-opener today."

Mu Qingcheng was also quite satisfied: "This stove has a damper. Open the damper and the wind will enter from here, and the fire will burn more and more vigorously. Close the damper and the fire will get smaller."

"However, burning coal also has a disadvantage, which is that the coal ash will make the house full of dust." Mu Qingcheng added.

A few grown men were enjoying it. Coal dust was no big deal to them. They didn't clean it anyway.

Zijin and Zipei immediately questioned, "Miss, then this stove can't be placed in the bedroom. Wouldn't such a large amount of dust stain the bedding?"

Mu Qingcheng comforted them: "This won't be a problem for me, your young lady. If you don't want it to produce coal dust, then crush it into powder, add a little yellow mud and water to make coal cakes, and poke a few holes in the middle for ventilation. This way, the coal blocks won't fall apart when burned, which can reduce coal dust."

This was the experience accumulated through countless attempts in later generations. But everyone was stunned. They didn't expect that coal could be manipulated in this way?

Feng Zhishang was even more curious about Mu Qingcheng's origins. This black stone was unheard of here, but this girl used it with ease. This couldn't be a whim; it was the result of countless attempts.

In everyone's eyes, this is already the most powerful heating device, but in Mu Qingcheng's eyes, it is just a primitive product.

She didn't want to wait for the coal furnace to slowly evolve and develop; she wanted to shorten that process. Now that coal was available, ironmaking technology would surely reach new heights.

She wants to build a boiler and install a radiator in the house to make the house clean and warm. This is her ultimate goal.

However, radiators involve water pipes and nuts. In an era without lathes, these small parts had to be made entirely by hand, and it was probably impossible to promote them.

At present, they can only promote this bulky iron stove.

While everyone was still gathered around the stove admiring it, Feng Zhishang noticed that Mu Qingcheng was in a daze. He quickly called Mo Yu and asked Mo Yu and others to carry another small stove to the east wing and put it in his bedroom. He was not afraid of coal ash.

Mo Yu didn't even look at Feng Zhishang, and directly asked Mo Yun and Mo Bing to carry the stove away. Their master Mu didn't even have one yet! This small stove was specially made by Master Mu for their master.

Feng Zhishang was so angry that he was puffing his beard and glaring, but when he saw that Mu Qingcheng didn't have a stove either, he felt relieved.

The stove was carried to the master bedroom and placed outside near the door and window, as Mu Qingcheng had instructed. The chimney extended from the window, and a large pot filled with water was placed on the stove, which also served as a water heater.

Yunqing takes a medicinal bath every day, which makes it convenient to use water, and Moyu doesn’t have to fetch water from the backyard all the time.

What was burned in Yunqing's house was not large pieces of coal. Instead, Moyu and the others followed Mu Qingcheng's method and ground the coal into powder, added yellow mud and mixed it with water to make coal cakes.

Mu Qingcheng also admired these people. Without a crusher, she had no idea how they turned the coal into powder.

Mo Yu proudly explained their great achievements to Mu Qingcheng. It turned out that they were pressed out with a stone roller.

Haha! Mu Qingcheng didn't know whether to praise them for their intelligence or to admire the dedication of this employee.

The coal blocks Moyu made were very similar to the honeycomb coal of later generations. When burned in the fire pit, they didn't disperse even after being reduced to ash. It was indeed dust-free.

Mu Qingcheng suddenly had an epiphany. Now that the iron stove has come into being, shouldn't the matching honeycomb coal also be available?

They can't just sell coal blocks, they can sell processed honeycomb coal! That way, no one will know what the original prototype of the coal is.

Once she provides the technology for making iron stoves free of charge to all blacksmith shops, they will be able to promote honeycomb coal.

The demand for honeycomb briquettes will be huge. Making them by hand alone is too slow, so a production line is necessary. We also need to make a tool that can mass-produce honeycomb briquettes.